[gtk+/wip/csoriano/bookmarks: 18/18] style



commit 7232cab3bb9f49b10f1200e0c638a25243551670
Author: Carlos Soriano <csoriano gnome org>
Date:   Tue May 12 18:55:32 2015 +0200

    style

 gtk/theme/Adwaita/_common.scss           |   58 ++---
 gtk/theme/Adwaita/gtk-contained-dark.css |  381 +++++++++++++++++-------------
 gtk/theme/Adwaita/gtk-contained.css      |  381 +++++++++++++++++-------------
 3 files changed, 467 insertions(+), 353 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 3b3992e..f337cbf 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -2880,47 +2880,39 @@ GtkFileChooserDialog {
   }
 }
 
-// Places sidebar is a special case, since the view here have to look like chrome not content, so we 
override text color
-GtkPlacesSidebar.sidebar .view {
+GtkPlacesSidebar.sidebar {
 
-  color: $fg_color;
-  background-color: transparent;
-
-  .separator,
-  .separator:backdrop { @extend .separator; }
-
-  .image { // icons color
-    color: mix($fg_color, $sidebar_bg_color, 70%);
-
-    &:selected {
-      color: mix($selected_fg_color, $selected_bg_color, 90%);
+  $_placesidebar_icons_opacity: 0.7;
 
-      &:backdrop { color: mix($backdrop_selected_fg_color, $selected_bg_color, 90%); }
-    }
-
-    &:insensitive { color: mix($insensitive_fg_color, $sidebar_bg_color, 70%); }
-
-    &:backdrop {
-      color: mix($backdrop_fg_color, $sidebar_bg_color, 70%);
-
-      &:insensitive { color: mix($backdrop_insensitive_color, $sidebar_bg_color, 70%); }
-    }
+  SidebarRow {
+    padding-left: 14px;
+    padding-right: 6px;
+    padding-top: 2px;
+    padding-bottom: 2px;
   }
 
-  &:insensitive { color: $insensitive_fg_color; }
-
-  &:backdrop {
-    color: $backdrop_fg_color;
-
-    &:insensitive { color: $backdrop_insensitive_color; }
-  }
+  SidebarRow > GtkBox > GtkImage { opacity: $_placesidebar_icons_opacity; } // dim the device icons
+  @at-root .sidebar-button.button { // @at-root needded to not change the specificity making button styling 
inheritance broken
+                                    // so istead of "GtkPlacesSidebar.sidebar .sidebar-button.button" 
[specificity 0,0,3,1]
+                                    // the extended selector ".sidebar-button.button" [specificity 0,0,2,0]
+    
+    &.image-button { padding: 6px; }
 
-  &:selected {
-    @extend %selected_items;
+    @extend .button.flat;
+    border-radius: 100%;
+    outline-radius: 100%;
+/*    &:hover:not(:active):not(:backdrop) {
+      background-image: none;
+      background-color: gtkalpha(currentColor, 0.1);
+      border-color: transparentize($borders_color, 1);
+      box-shadow: inset 0 0 transparentize(white, 1);
+      icon-shadow: none;
+    } */
+    &:not(:hover):not(:active) > GtkImage,
+    &:backdrop > GtkImage { opacity: $_placesidebar_icons_opacity };
   }
 }
 
-
 .sidebar-item {
   padding: 10px 4px;
   > .label {
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index 95e0cb8..6281202 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -77,16 +77,16 @@
   border: 1px solid #215d9c;
   background-color: rgba(33, 93, 156, 0.2); }
 
-.label.separator, GtkPlacesSidebar.sidebar .view .label.separator {
+.label.separator {
   color: #eeeeec; }
-  .label.separator:backdrop, GtkPlacesSidebar.sidebar .view .label.separator:backdrop {
+  .label.separator:backdrop {
     color: #939695; }
 .label:insensitive {
   color: #939695; }
   .label:insensitive:backdrop {
     color: #5d6767; }
 
-.dim-label, .label.separator, GtkPlacesSidebar.sidebar .view .label.separator, .titlebar .subtitle,
+.dim-label, .label.separator, .titlebar .subtitle,
 .header-bar .subtitle {
   opacity: 0.55;
   text-shadow: none; }
@@ -336,7 +336,7 @@ GtkTextView {
   text-shadow: 0 -1px rgba(0, 0, 0, 0.81176);
   icon-shadow: 0 -1px rgba(0, 0, 0, 0.81176);
   box-shadow: inset 0 1px rgba(255, 255, 255, 0.1), 0 1px rgba(238, 238, 236, 0.1); }
-  .button.flat, .header-bar .titlebutton.button,
+  .button.flat, .sidebar-button.button, .header-bar .titlebutton.button,
   .titlebar .titlebutton.button {
     border-color: transparent;
     background-color: transparent;
@@ -345,11 +345,11 @@ GtkTextView {
     text-shadow: none;
     icon-shadow: none;
     transition: none; }
-    .button.flat:hover, .header-bar .titlebutton.button:hover,
+    .button.flat:hover, .sidebar-button.button:hover, .header-bar .titlebutton.button:hover,
     .titlebar .titlebutton.button:hover {
       transition: all 200ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
       transition-duration: 500ms; }
-      .button.flat:hover:active, .header-bar .titlebutton.button:hover:active,
+      .button.flat:hover:active, .sidebar-button.button:hover:active, .header-bar 
.titlebutton.button:hover:active,
       .titlebar .titlebutton.button:hover:active {
         transition: all 200ms cubic-bezier(0.25, 0.46, 0.45, 0.94); }
   .button:hover, .header-bar .button.titlebutton:hover,
@@ -374,7 +374,7 @@ GtkTextView {
     box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6), 0 1px rgba(238, 
238, 236, 0.1);
     transition-duration: 50ms; }
   .button:backdrop, .header-bar .button.titlebutton:backdrop,
-  .titlebar .button.titlebutton:backdrop, .button.flat:backdrop, .header-bar .titlebutton.button:backdrop,
+  .titlebar .button.titlebutton:backdrop, .button.flat:backdrop, .sidebar-button.button:backdrop, 
.header-bar .titlebutton.button:backdrop,
   .titlebar .titlebutton.button:backdrop {
     color: #939695;
     border-color: #1e2222;
@@ -383,14 +383,14 @@ GtkTextView {
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0);
     -gtk-image-effect: none; }
-    .button:backdrop:active, .button:backdrop:checked, .button.flat:backdrop:active, .header-bar 
.titlebutton.button:backdrop:active,
-    .titlebar .titlebutton.button:backdrop:active, .button.flat:backdrop:checked, .header-bar 
.titlebutton.button:backdrop:checked,
+    .button:backdrop:active, .button:backdrop:checked, .button.flat:backdrop:active, 
.sidebar-button.button:backdrop:active, .header-bar .titlebutton.button:backdrop:active,
+    .titlebar .titlebutton.button:backdrop:active, .button.flat:backdrop:checked, 
.sidebar-button.button:backdrop:checked, .header-bar .titlebutton.button:backdrop:checked,
     .titlebar .titlebutton.button:backdrop:checked {
       color: #939695;
       border-color: #1e2222;
       background-image: linear-gradient(to bottom, #2f3434);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-    .button:backdrop:insensitive, .button.flat:backdrop:insensitive, .header-bar 
.titlebutton.button:backdrop:insensitive,
+    .button:backdrop:insensitive, .button.flat:backdrop:insensitive, 
.sidebar-button.button:backdrop:insensitive, .header-bar .titlebutton.button:backdrop:insensitive,
     .titlebar .titlebutton.button:backdrop:insensitive {
       color: #5d6767;
       border-color: #1e2222;
@@ -399,11 +399,11 @@ GtkTextView {
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
       .button:backdrop:insensitive > .label, .header-bar .button.titlebutton:backdrop:insensitive > .label,
-      .titlebar .button.titlebutton:backdrop:insensitive > .label, .button.flat:backdrop:insensitive > 
.label, .header-bar .titlebutton.button:backdrop:insensitive > .label,
+      .titlebar .button.titlebutton:backdrop:insensitive > .label, .button.flat:backdrop:insensitive > 
.label, .sidebar-button.button:backdrop:insensitive > .label, .header-bar 
.titlebutton.button:backdrop:insensitive > .label,
       .titlebar .titlebutton.button:backdrop:insensitive > .label {
         color: inherit; }
-    .button:backdrop:insensitive:active, .button:backdrop:insensitive:checked, 
.button.flat:backdrop:insensitive:active, .header-bar .titlebutton.button:backdrop:insensitive:active,
-    .titlebar .titlebutton.button:backdrop:insensitive:active, .button.flat:backdrop:insensitive:checked, 
.header-bar .titlebutton.button:backdrop:insensitive:checked,
+    .button:backdrop:insensitive:active, .button:backdrop:insensitive:checked, 
.button.flat:backdrop:insensitive:active, .sidebar-button.button:backdrop:insensitive:active, .header-bar 
.titlebutton.button:backdrop:insensitive:active,
+    .titlebar .titlebutton.button:backdrop:insensitive:active, .button.flat:backdrop:insensitive:checked, 
.sidebar-button.button:backdrop:insensitive:checked, .header-bar 
.titlebutton.button:backdrop:insensitive:checked,
     .titlebar .titlebutton.button:backdrop:insensitive:checked {
       color: #5d6767;
       border-color: #1e2222;
@@ -411,13 +411,13 @@ GtkTextView {
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
       .button:backdrop:insensitive:active > .label, .header-bar 
.button.titlebutton:backdrop:insensitive:active > .label,
       .titlebar .button.titlebutton:backdrop:insensitive:active > .label, 
.button:backdrop:insensitive:checked > .label, .header-bar .button.titlebutton:backdrop:insensitive:checked > 
.label,
-      .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, 
.button.flat:backdrop:insensitive:active > .label, .header-bar 
.titlebutton.button:backdrop:insensitive:active > .label,
-      .titlebar .titlebutton.button:backdrop:insensitive:active > .label, 
.button.flat:backdrop:insensitive:checked > .label, .header-bar 
.titlebutton.button:backdrop:insensitive:checked > .label,
+      .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, 
.button.flat:backdrop:insensitive:active > .label, .sidebar-button.button:backdrop:insensitive:active > 
.label, .header-bar .titlebutton.button:backdrop:insensitive:active > .label,
+      .titlebar .titlebutton.button:backdrop:insensitive:active > .label, 
.button.flat:backdrop:insensitive:checked > .label, .sidebar-button.button:backdrop:insensitive:checked > 
.label, .header-bar .titlebutton.button:backdrop:insensitive:checked > .label,
       .titlebar .titlebutton.button:backdrop:insensitive:checked > .label {
         color: inherit; }
-  .button.flat:backdrop, .header-bar .titlebutton.button:backdrop,
-  .titlebar .titlebutton.button:backdrop, .button.flat:insensitive, .header-bar 
.titlebutton.button:insensitive,
-  .titlebar .titlebutton.button:insensitive, .button.flat:backdrop:insensitive, .header-bar 
.titlebutton.button:backdrop:insensitive,
+  .button.flat:backdrop, .sidebar-button.button:backdrop, .header-bar .titlebutton.button:backdrop,
+  .titlebar .titlebutton.button:backdrop, .button.flat:insensitive, .sidebar-button.button:insensitive, 
.header-bar .titlebutton.button:insensitive,
+  .titlebar .titlebutton.button:insensitive, .button.flat:backdrop:insensitive, 
.sidebar-button.button:backdrop:insensitive, .header-bar .titlebutton.button:backdrop:insensitive,
   .titlebar .titlebutton.button:backdrop:insensitive {
     border-color: transparent;
     background-color: transparent;
@@ -564,7 +564,7 @@ GtkTextView {
       box-shadow: none;
       text-shadow: none;
       icon-shadow: none; }
-    .osd .button.flat, .osd .header-bar .titlebutton.button, .header-bar .osd .titlebutton.button,
+    .osd .button.flat, .osd .sidebar-button.button, .osd .header-bar .titlebutton.button, .header-bar .osd 
.titlebutton.button,
     .osd .titlebar .titlebutton.button,
     .titlebar .osd .titlebutton.button {
       border-color: transparent;
@@ -576,7 +576,7 @@ GtkTextView {
       box-shadow: none;
       text-shadow: 0 1px black;
       icon-shadow: 0 1px black; }
-      .osd .button.flat:hover, .osd .header-bar .titlebutton.button:hover, .header-bar .osd 
.titlebutton.button:hover,
+      .osd .button.flat:hover, .osd .sidebar-button.button:hover, .osd .header-bar 
.titlebutton.button:hover, .header-bar .osd .titlebutton.button:hover,
       .osd .titlebar .titlebutton.button:hover,
       .titlebar .osd .titlebutton.button:hover {
         color: white;
@@ -590,7 +590,7 @@ GtkTextView {
         background-clip: padding-box;
         border-color: transparent;
         box-shadow: none; }
-      .osd .button.flat:insensitive, .osd .header-bar .titlebutton.button:insensitive, .header-bar .osd 
.titlebutton.button:insensitive,
+      .osd .button.flat:insensitive, .osd .sidebar-button.button:insensitive, .osd .header-bar 
.titlebutton.button:insensitive, .header-bar .osd .titlebutton.button:insensitive,
       .osd .titlebar .titlebutton.button:insensitive,
       .titlebar .osd .titlebutton.button:insensitive {
         color: #878989;
@@ -603,7 +603,7 @@ GtkTextView {
         background-image: none;
         border-color: transparent;
         box-shadow: none; }
-      .osd .button.flat:backdrop, .osd .header-bar .titlebutton.button:backdrop, .header-bar .osd 
.titlebutton.button:backdrop,
+      .osd .button.flat:backdrop, .osd .sidebar-button.button:backdrop, .osd .header-bar 
.titlebutton.button:backdrop, .header-bar .osd .titlebutton.button:backdrop,
       .osd .titlebar .titlebutton.button:backdrop,
       .titlebar .osd .titlebutton.button:backdrop {
         border-color: transparent;
@@ -612,9 +612,9 @@ GtkTextView {
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0);
         text-shadow: none;
         icon-shadow: none; }
-      .osd .button.flat:active, .osd .header-bar .titlebutton.button:active, .header-bar .osd 
.titlebutton.button:active,
+      .osd .button.flat:active, .osd .sidebar-button.button:active, .osd .header-bar 
.titlebutton.button:active, .header-bar .osd .titlebutton.button:active,
       .osd .titlebar .titlebutton.button:active,
-      .titlebar .osd .titlebutton.button:active, .osd .button.flat:checked, .osd .header-bar 
.titlebutton.button:checked, .header-bar .osd .titlebutton.button:checked,
+      .titlebar .osd .titlebutton.button:active, .osd .button.flat:checked, .osd 
.sidebar-button.button:checked, .osd .header-bar .titlebutton.button:checked, .header-bar .osd 
.titlebutton.button:checked,
       .osd .titlebar .titlebutton.button:checked,
       .titlebar .osd .titlebutton.button:checked {
         color: white;
@@ -637,7 +637,7 @@ GtkTextView {
     text-shadow: 0 -1px rgba(0, 0, 0, 0.70353);
     icon-shadow: 0 -1px rgba(0, 0, 0, 0.70353);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1), 0 1px rgba(238, 238, 236, 0.1); }
-    .button.suggested-action.flat, .header-bar .suggested-action.titlebutton.button,
+    .button.suggested-action.flat, .suggested-action.sidebar-button.button, .header-bar 
.suggested-action.titlebutton.button,
     .titlebar .suggested-action.titlebutton.button {
       border-color: transparent;
       background-color: transparent;
@@ -662,7 +662,7 @@ GtkTextView {
       text-shadow: 0 -1px rgba(0, 0, 0, 0.78353);
       icon-shadow: 0 -1px rgba(0, 0, 0, 0.78353);
       box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6), 0 1px rgba(238, 
238, 236, 0.1); }
-    .button.suggested-action:backdrop, .button.suggested-action.flat:backdrop, .header-bar 
.suggested-action.titlebutton.button:backdrop,
+    .button.suggested-action:backdrop, .button.suggested-action.flat:backdrop, 
.suggested-action.sidebar-button.button:backdrop, .header-bar .suggested-action.titlebutton.button:backdrop,
     .titlebar .suggested-action.titlebutton.button:backdrop {
       color: #d2deeb;
       border-color: #0b1e33;
@@ -670,14 +670,14 @@ GtkTextView {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-      .button.suggested-action:backdrop:active, .button.suggested-action:backdrop:checked, 
.button.suggested-action.flat:backdrop:active, .header-bar 
.suggested-action.titlebutton.button:backdrop:active,
-      .titlebar .suggested-action.titlebutton.button:backdrop:active, 
.button.suggested-action.flat:backdrop:checked, .header-bar 
.suggested-action.titlebutton.button:backdrop:checked,
+      .button.suggested-action:backdrop:active, .button.suggested-action:backdrop:checked, 
.button.suggested-action.flat:backdrop:active, .suggested-action.sidebar-button.button:backdrop:active, 
.header-bar .suggested-action.titlebutton.button:backdrop:active,
+      .titlebar .suggested-action.titlebutton.button:backdrop:active, 
.button.suggested-action.flat:backdrop:checked, .suggested-action.sidebar-button.button:backdrop:checked, 
.header-bar .suggested-action.titlebutton.button:backdrop:checked,
       .titlebar .suggested-action.titlebutton.button:backdrop:checked {
         color: #d0d9e2;
         border-color: #0b1e33;
         background-image: linear-gradient(to bottom, #184472);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-      .button.suggested-action:backdrop:insensitive, .button.suggested-action.flat:backdrop:insensitive, 
.header-bar .suggested-action.titlebutton.button:backdrop:insensitive,
+      .button.suggested-action:backdrop:insensitive, .button.suggested-action.flat:backdrop:insensitive, 
.suggested-action.sidebar-button.button:backdrop:insensitive, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive,
       .titlebar .suggested-action.titlebutton.button:backdrop:insensitive {
         color: #5d6767;
         border-color: #1e2222;
@@ -686,11 +686,11 @@ GtkTextView {
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
         .button.suggested-action:backdrop:insensitive > .label, .header-bar 
.suggested-action.button.titlebutton:backdrop:insensitive > .label,
-        .titlebar .suggested-action.button.titlebutton:backdrop:insensitive > .label, 
.button.suggested-action.flat:backdrop:insensitive > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive > .label,
+        .titlebar .suggested-action.button.titlebutton:backdrop:insensitive > .label, 
.button.suggested-action.flat:backdrop:insensitive > .label, 
.suggested-action.sidebar-button.button:backdrop:insensitive > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive > .label,
         .titlebar .suggested-action.titlebutton.button:backdrop:insensitive > .label {
           color: inherit; }
-        .button.suggested-action:backdrop:insensitive:active, 
.button.suggested-action:backdrop:insensitive:checked, 
.button.suggested-action.flat:backdrop:insensitive:active, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:active,
-        .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:active, 
.button.suggested-action.flat:backdrop:insensitive:checked, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:checked,
+        .button.suggested-action:backdrop:insensitive:active, 
.button.suggested-action:backdrop:insensitive:checked, 
.button.suggested-action.flat:backdrop:insensitive:active, 
.suggested-action.sidebar-button.button:backdrop:insensitive:active, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:active,
+        .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:active, 
.button.suggested-action.flat:backdrop:insensitive:checked, 
.suggested-action.sidebar-button.button:backdrop:insensitive:checked, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:checked,
         .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:checked {
           color: #6c88a5;
           border-color: #0b1e33;
@@ -698,13 +698,13 @@ GtkTextView {
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
           .button.suggested-action:backdrop:insensitive:active > .label, .header-bar 
.suggested-action.button.titlebutton:backdrop:insensitive:active > .label,
           .titlebar .suggested-action.button.titlebutton:backdrop:insensitive:active > .label, 
.button.suggested-action:backdrop:insensitive:checked > .label, .header-bar 
.suggested-action.button.titlebutton:backdrop:insensitive:checked > .label,
-          .titlebar .suggested-action.button.titlebutton:backdrop:insensitive:checked > .label, 
.button.suggested-action.flat:backdrop:insensitive:active > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:active > .label,
-          .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:active > .label, 
.button.suggested-action.flat:backdrop:insensitive:checked > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:checked > .label,
+          .titlebar .suggested-action.button.titlebutton:backdrop:insensitive:checked > .label, 
.button.suggested-action.flat:backdrop:insensitive:active > .label, 
.suggested-action.sidebar-button.button:backdrop:insensitive:active > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:active > .label,
+          .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:active > .label, 
.button.suggested-action.flat:backdrop:insensitive:checked > .label, 
.suggested-action.sidebar-button.button:backdrop:insensitive:checked > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:checked > .label,
           .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
-    .button.suggested-action.flat:backdrop, .header-bar .suggested-action.titlebutton.button:backdrop,
-    .titlebar .suggested-action.titlebutton.button:backdrop, .button.suggested-action.flat:insensitive, 
.header-bar .suggested-action.titlebutton.button:insensitive,
-    .titlebar .suggested-action.titlebutton.button:insensitive, 
.button.suggested-action.flat:backdrop:insensitive, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive,
+    .button.suggested-action.flat:backdrop, .suggested-action.sidebar-button.button:backdrop, .header-bar 
.suggested-action.titlebutton.button:backdrop,
+    .titlebar .suggested-action.titlebutton.button:backdrop, .button.suggested-action.flat:insensitive, 
.suggested-action.sidebar-button.button:insensitive, .header-bar 
.suggested-action.titlebutton.button:insensitive,
+    .titlebar .suggested-action.titlebutton.button:insensitive, 
.button.suggested-action.flat:backdrop:insensitive, 
.suggested-action.sidebar-button.button:backdrop:insensitive, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive,
     .titlebar .suggested-action.titlebutton.button:backdrop:insensitive {
       border-color: transparent;
       background-color: transparent;
@@ -784,7 +784,7 @@ GtkTextView {
     text-shadow: 0 -1px rgba(0, 0, 0, 0.64078);
     icon-shadow: 0 -1px rgba(0, 0, 0, 0.64078);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.3), 0 1px rgba(238, 238, 236, 0.1); }
-    .button.destructive-action.flat, .header-bar .destructive-action.titlebutton.button,
+    .button.destructive-action.flat, .destructive-action.sidebar-button.button, .header-bar 
.destructive-action.titlebutton.button,
     .titlebar .destructive-action.titlebutton.button {
       border-color: transparent;
       background-color: transparent;
@@ -809,7 +809,7 @@ GtkTextView {
       text-shadow: 0 -1px rgba(0, 0, 0, 0.72078);
       icon-shadow: 0 -1px rgba(0, 0, 0, 0.72078);
       box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6), 0 1px rgba(238, 
238, 236, 0.1); }
-    .button.destructive-action:backdrop, .button.destructive-action.flat:backdrop, .header-bar 
.destructive-action.titlebutton.button:backdrop,
+    .button.destructive-action:backdrop, .button.destructive-action.flat:backdrop, 
.destructive-action.sidebar-button.button:backdrop, .header-bar 
.destructive-action.titlebutton.button:backdrop,
     .titlebar .destructive-action.titlebutton.button:backdrop {
       color: #f6cfcf;
       border-color: #5e0707;
@@ -817,14 +817,14 @@ GtkTextView {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-      .button.destructive-action:backdrop:active, .button.destructive-action:backdrop:checked, 
.button.destructive-action.flat:backdrop:active, .header-bar 
.destructive-action.titlebutton.button:backdrop:active,
-      .titlebar .destructive-action.titlebutton.button:backdrop:active, 
.button.destructive-action.flat:backdrop:checked, .header-bar 
.destructive-action.titlebutton.button:backdrop:checked,
+      .button.destructive-action:backdrop:active, .button.destructive-action:backdrop:checked, 
.button.destructive-action.flat:backdrop:active, .destructive-action.sidebar-button.button:backdrop:active, 
.header-bar .destructive-action.titlebutton.button:backdrop:active,
+      .titlebar .destructive-action.titlebutton.button:backdrop:active, 
.button.destructive-action.flat:backdrop:checked, .destructive-action.sidebar-button.button:backdrop:checked, 
.header-bar .destructive-action.titlebutton.button:backdrop:checked,
       .titlebar .destructive-action.titlebutton.button:backdrop:checked {
         color: #edcece;
         border-color: #5e0707;
         background-image: linear-gradient(to bottom, #a60c0c);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-      .button.destructive-action:backdrop:insensitive, .button.destructive-action.flat:backdrop:insensitive, 
.header-bar .destructive-action.titlebutton.button:backdrop:insensitive,
+      .button.destructive-action:backdrop:insensitive, .button.destructive-action.flat:backdrop:insensitive, 
.destructive-action.sidebar-button.button:backdrop:insensitive, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive,
       .titlebar .destructive-action.titlebutton.button:backdrop:insensitive {
         color: #5d6767;
         border-color: #1e2222;
@@ -833,11 +833,11 @@ GtkTextView {
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
         .button.destructive-action:backdrop:insensitive > .label, .header-bar 
.destructive-action.button.titlebutton:backdrop:insensitive > .label,
-        .titlebar .destructive-action.button.titlebutton:backdrop:insensitive > .label, 
.button.destructive-action.flat:backdrop:insensitive > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive > .label,
+        .titlebar .destructive-action.button.titlebutton:backdrop:insensitive > .label, 
.button.destructive-action.flat:backdrop:insensitive > .label, 
.destructive-action.sidebar-button.button:backdrop:insensitive > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive > .label,
         .titlebar .destructive-action.titlebutton.button:backdrop:insensitive > .label {
           color: inherit; }
-        .button.destructive-action:backdrop:insensitive:active, 
.button.destructive-action:backdrop:insensitive:checked, 
.button.destructive-action.flat:backdrop:insensitive:active, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:active,
-        .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:active, 
.button.destructive-action.flat:backdrop:insensitive:checked, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:checked,
+        .button.destructive-action:backdrop:insensitive:active, 
.button.destructive-action:backdrop:insensitive:checked, 
.button.destructive-action.flat:backdrop:insensitive:active, 
.destructive-action.sidebar-button.button:backdrop:insensitive:active, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:active,
+        .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:active, 
.button.destructive-action.flat:backdrop:insensitive:checked, 
.destructive-action.sidebar-button.button:backdrop:insensitive:checked, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:checked,
         .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:checked {
           color: #c36464;
           border-color: #5e0707;
@@ -845,13 +845,13 @@ GtkTextView {
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
           .button.destructive-action:backdrop:insensitive:active > .label, .header-bar 
.destructive-action.button.titlebutton:backdrop:insensitive:active > .label,
           .titlebar .destructive-action.button.titlebutton:backdrop:insensitive:active > .label, 
.button.destructive-action:backdrop:insensitive:checked > .label, .header-bar 
.destructive-action.button.titlebutton:backdrop:insensitive:checked > .label,
-          .titlebar .destructive-action.button.titlebutton:backdrop:insensitive:checked > .label, 
.button.destructive-action.flat:backdrop:insensitive:active > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:active > .label,
-          .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:active > .label, 
.button.destructive-action.flat:backdrop:insensitive:checked > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:checked > .label,
+          .titlebar .destructive-action.button.titlebutton:backdrop:insensitive:checked > .label, 
.button.destructive-action.flat:backdrop:insensitive:active > .label, 
.destructive-action.sidebar-button.button:backdrop:insensitive:active > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:active > .label,
+          .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:active > .label, 
.button.destructive-action.flat:backdrop:insensitive:checked > .label, 
.destructive-action.sidebar-button.button:backdrop:insensitive:checked > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:checked > .label,
           .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
-    .button.destructive-action.flat:backdrop, .header-bar .destructive-action.titlebutton.button:backdrop,
-    .titlebar .destructive-action.titlebutton.button:backdrop, .button.destructive-action.flat:insensitive, 
.header-bar .destructive-action.titlebutton.button:insensitive,
-    .titlebar .destructive-action.titlebutton.button:insensitive, 
.button.destructive-action.flat:backdrop:insensitive, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive,
+    .button.destructive-action.flat:backdrop, .destructive-action.sidebar-button.button:backdrop, 
.header-bar .destructive-action.titlebutton.button:backdrop,
+    .titlebar .destructive-action.titlebutton.button:backdrop, .button.destructive-action.flat:insensitive, 
.destructive-action.sidebar-button.button:insensitive, .header-bar 
.destructive-action.titlebutton.button:insensitive,
+    .titlebar .destructive-action.titlebutton.button:insensitive, 
.button.destructive-action.flat:backdrop:insensitive, 
.destructive-action.sidebar-button.button:backdrop:insensitive, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive,
     .titlebar .destructive-action.titlebutton.button:backdrop:insensitive {
       border-color: transparent;
       background-color: transparent;
@@ -1063,13 +1063,17 @@ GtkTextView {
     .inline-toolbar GtkToolButton > .button:backdrop:insensitive:active > .label, .inline-toolbar 
GtkToolButton > .button:backdrop:insensitive:checked > .label {
       color: inherit; }
 
-.inline-toolbar.toolbar GtkToolButton > .button.flat, .inline-toolbar GtkToolButton > .button.flat, 
.inline-toolbar.search-bar GtkToolButton > .button.flat, .inline-toolbar.location-bar GtkToolButton > 
.button.flat, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton > .button.titlebutton,
+.inline-toolbar.toolbar GtkToolButton > .button.flat, .inline-toolbar GtkToolButton > .button.flat, 
.inline-toolbar.search-bar GtkToolButton > .button.flat, .inline-toolbar.location-bar GtkToolButton > 
.button.flat, .inline-toolbar.toolbar GtkToolButton > .sidebar-button.button, .inline-toolbar GtkToolButton > 
.sidebar-button.button, .inline-toolbar.search-bar GtkToolButton > .sidebar-button.button, 
.inline-toolbar.location-bar GtkToolButton > .sidebar-button.button, .inline-toolbar .header-bar 
GtkToolButton > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop > .button.flat,
 .inline-toolbar GtkToolButton:backdrop > .button.flat,
 .inline-toolbar.search-bar GtkToolButton:backdrop > .button.flat,
 .inline-toolbar.location-bar GtkToolButton:backdrop > .button.flat,
+.inline-toolbar.toolbar GtkToolButton:backdrop > .sidebar-button.button,
+.inline-toolbar GtkToolButton:backdrop > .sidebar-button.button,
+.inline-toolbar.search-bar GtkToolButton:backdrop > .sidebar-button.button,
+.inline-toolbar.location-bar GtkToolButton:backdrop > .sidebar-button.button,
 .inline-toolbar .header-bar GtkToolButton:backdrop > .button.titlebutton,
 .header-bar .inline-toolbar GtkToolButton:backdrop > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:backdrop > .button.titlebutton,
@@ -1081,16 +1085,21 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
 .titlebar GtkComboBox.combobox-entry .button.titlebutton, GtkComboBox.combobox-entry .button:backdrop, 
.linked > GtkComboBox > .button:dir(ltr) {
   border-radius: 0;
   border-left-style: none; }
-  .inline-toolbar GtkToolButton > .button.flat:dir(rtl), .inline-toolbar .header-bar GtkToolButton > 
.button.titlebutton:dir(rtl), .header-bar .inline-toolbar GtkToolButton > .button.titlebutton:dir(rtl),
+  .inline-toolbar GtkToolButton > .button.flat:dir(rtl), .inline-toolbar GtkToolButton > 
.sidebar-button.button:dir(rtl), .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:dir(rtl), 
.header-bar .inline-toolbar GtkToolButton > .button.titlebutton:dir(rtl),
   .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:dir(rtl),
   .titlebar .inline-toolbar GtkToolButton > .button.titlebutton:dir(rtl),
-  .inline-toolbar GtkToolButton:backdrop > .button.flat:dir(rtl), .inline-toolbar.toolbar 
GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar GtkToolButton:dir(rtl) > .button.flat, 
.inline-toolbar.search-bar GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar.location-bar 
GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar .header-bar GtkToolButton:dir(rtl) > 
.button.titlebutton, .header-bar .inline-toolbar GtkToolButton:dir(rtl) > .button.titlebutton,
+  .inline-toolbar GtkToolButton:backdrop > .button.flat:dir(rtl),
+  .inline-toolbar GtkToolButton:backdrop > .sidebar-button.button:dir(rtl), .inline-toolbar.toolbar 
GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar GtkToolButton:dir(rtl) > .button.flat, 
.inline-toolbar.search-bar GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar.location-bar 
GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar.toolbar GtkToolButton:dir(rtl) > 
.sidebar-button.button, .inline-toolbar GtkToolButton:dir(rtl) > .sidebar-button.button, 
.inline-toolbar.search-bar GtkToolButton:dir(rtl) > .sidebar-button.button, .inline-toolbar.location-bar 
GtkToolButton:dir(rtl) > .sidebar-button.button, .inline-toolbar .header-bar GtkToolButton:dir(rtl) > 
.button.titlebutton, .header-bar .inline-toolbar GtkToolButton:dir(rtl) > .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:dir(rtl) > .button.titlebutton,
   .titlebar .inline-toolbar GtkToolButton:dir(rtl) > .button.titlebutton,
   .inline-toolbar.toolbar GtkToolButton:backdrop:dir(rtl) > .button.flat,
   .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .button.flat,
   .inline-toolbar.search-bar GtkToolButton:backdrop:dir(rtl) > .button.flat,
   .inline-toolbar.location-bar GtkToolButton:backdrop:dir(rtl) > .button.flat,
+  .inline-toolbar.toolbar GtkToolButton:backdrop:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar.search-bar GtkToolButton:backdrop:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar.location-bar GtkToolButton:backdrop:dir(rtl) > .sidebar-button.button,
   .inline-toolbar .header-bar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
   .header-bar .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
@@ -1101,13 +1110,17 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
     border-left-style: solid; }
 
 .osd .button:first-child:hover, .osd .button:first-child:active, .osd .button:first-child:checked, .osd 
.button:first-child:insensitive, .osd .button:first-child:backdrop, .osd 
.button.suggested-action:first-child, .osd .button.destructive-action:first-child, .inline-toolbar 
.button:first-child, .linked > .button:first-child, .header-bar .linked > .button.titlebutton:first-child,
-.titlebar .linked > .button.titlebutton:first-child, .inline-toolbar.toolbar GtkToolButton:first-child > 
.button.flat, .inline-toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:first-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:first-child > 
.button.flat, .inline-toolbar .header-bar GtkToolButton:first-child > .button.titlebutton, .header-bar 
.inline-toolbar GtkToolButton:first-child > .button.titlebutton,
+.titlebar .linked > .button.titlebutton:first-child, .inline-toolbar.toolbar GtkToolButton:first-child > 
.button.flat, .inline-toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:first-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:first-child > 
.button.flat, .inline-toolbar.toolbar GtkToolButton:first-child > .sidebar-button.button, .inline-toolbar 
GtkToolButton:first-child > .sidebar-button.button, .inline-toolbar.search-bar GtkToolButton:first-child > 
.sidebar-button.button, .inline-toolbar.location-bar GtkToolButton:first-child > .sidebar-button.button, 
.inline-toolbar .header-bar GtkToolButton:first-child > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton:first-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:first-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:first-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:first-child > .button.flat,
 .inline-toolbar GtkToolButton:backdrop:first-child > .button.flat,
 .inline-toolbar.search-bar GtkToolButton:backdrop:first-child > .button.flat,
 .inline-toolbar.location-bar GtkToolButton:backdrop:first-child > .button.flat,
+.inline-toolbar.toolbar GtkToolButton:backdrop:first-child > .sidebar-button.button,
+.inline-toolbar GtkToolButton:backdrop:first-child > .sidebar-button.button,
+.inline-toolbar.search-bar GtkToolButton:backdrop:first-child > .sidebar-button.button,
+.inline-toolbar.location-bar GtkToolButton:backdrop:first-child > .sidebar-button.button,
 .inline-toolbar .header-bar GtkToolButton:backdrop:first-child > .button.titlebutton,
 .header-bar .inline-toolbar GtkToolButton:backdrop:first-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:backdrop:first-child > .button.titlebutton,
@@ -1115,42 +1128,55 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   border-radius: 3px 0 0 3px;
   border-left-style: solid; }
 .osd .button:last-child:hover, .osd .button:last-child:active, .osd .button:last-child:checked, .osd 
.button:last-child:insensitive, .osd .button:last-child:backdrop, .osd .button.suggested-action:last-child, 
.osd .button.destructive-action:last-child, .inline-toolbar .button:last-child, .linked > .button:last-child, 
.header-bar .linked > .button.titlebutton:last-child,
-.titlebar .linked > .button.titlebutton:last-child, .inline-toolbar.toolbar GtkToolButton:last-child > 
.button.flat, .inline-toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:last-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:last-child > 
.button.flat, .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton, .header-bar 
.inline-toolbar GtkToolButton:last-child > .button.titlebutton,
+.titlebar .linked > .button.titlebutton:last-child, .inline-toolbar.toolbar GtkToolButton:last-child > 
.button.flat, .inline-toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:last-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:last-child > 
.button.flat, .inline-toolbar.toolbar GtkToolButton:last-child > .sidebar-button.button, .inline-toolbar 
GtkToolButton:last-child > .sidebar-button.button, .inline-toolbar.search-bar GtkToolButton:last-child > 
.sidebar-button.button, .inline-toolbar.location-bar GtkToolButton:last-child > .sidebar-button.button, 
.inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton:last-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:last-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:last-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:last-child > .button.flat,
 .inline-toolbar GtkToolButton:backdrop:last-child > .button.flat,
 .inline-toolbar.search-bar GtkToolButton:backdrop:last-child > .button.flat,
 .inline-toolbar.location-bar GtkToolButton:backdrop:last-child > .button.flat,
+.inline-toolbar.toolbar GtkToolButton:backdrop:last-child > .sidebar-button.button,
+.inline-toolbar GtkToolButton:backdrop:last-child > .sidebar-button.button,
+.inline-toolbar.search-bar GtkToolButton:backdrop:last-child > .sidebar-button.button,
+.inline-toolbar.location-bar GtkToolButton:backdrop:last-child > .sidebar-button.button,
 .inline-toolbar .header-bar GtkToolButton:backdrop:last-child > .button.titlebutton,
 .header-bar .inline-toolbar GtkToolButton:backdrop:last-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:backdrop:last-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:backdrop:last-child > .button.titlebutton, 
GtkComboBox.combobox-entry .entry:last-child, GtkComboBox.combobox-entry .button:last-child, .linked > 
GtkComboBox:last-child > .button {
   border-radius: 0 3px 3px 0; }
   .osd .button:last-child:dir(rtl):hover, .osd .button:last-child:dir(rtl):active, .osd 
.button:last-child:dir(rtl):checked, .osd .button:last-child:dir(rtl):insensitive, .osd 
.button:last-child:dir(rtl):backdrop, .osd .button.suggested-action:last-child:dir(rtl), .osd 
.button.destructive-action:last-child:dir(rtl), .inline-toolbar .button:last-child:dir(rtl), .linked > 
.button:last-child:dir(rtl), .header-bar .linked > .button.titlebutton:last-child:dir(rtl),
-  .titlebar .linked > .button.titlebutton:last-child:dir(rtl), .inline-toolbar GtkToolButton:last-child > 
.button.flat:dir(rtl), .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton:dir(rtl), 
.header-bar .inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
+  .titlebar .linked > .button.titlebutton:last-child:dir(rtl), .inline-toolbar GtkToolButton:last-child > 
.button.flat:dir(rtl), .inline-toolbar GtkToolButton:last-child > .sidebar-button.button:dir(rtl), 
.inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton:dir(rtl), .header-bar 
.inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
   .inline-toolbar .titlebar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
   .titlebar .inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
-  .inline-toolbar GtkToolButton:backdrop:last-child > .button.flat:dir(rtl), .inline-toolbar.toolbar 
GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar GtkToolButton:last-child:dir(rtl) > 
.button.flat, .inline-toolbar.search-bar GtkToolButton:last-child:dir(rtl) > .button.flat, 
.inline-toolbar.location-bar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar .header-bar 
GtkToolButton:last-child:dir(rtl) > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton:last-child:dir(rtl) > .button.titlebutton,
+  .inline-toolbar GtkToolButton:backdrop:last-child > .button.flat:dir(rtl),
+  .inline-toolbar GtkToolButton:backdrop:last-child > .sidebar-button.button:dir(rtl), 
.inline-toolbar.toolbar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar 
GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar.location-bar 
GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar.toolbar GtkToolButton:last-child:dir(rtl) > 
.sidebar-button.button, .inline-toolbar GtkToolButton:last-child:dir(rtl) > .sidebar-button.button, 
.inline-toolbar.search-bar GtkToolButton:last-child:dir(rtl) > .sidebar-button.button, 
.inline-toolbar.location-bar GtkToolButton:last-child:dir(rtl) > .sidebar-button.button, .inline-toolbar 
.header-bar GtkToolButton:last-child:dir(rtl) > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton:last-child:dir(rtl) > .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:last-child:dir(rtl) > .button.titlebutton,
   .titlebar .inline-toolbar GtkToolButton:last-child:dir(rtl) > .button.titlebutton,
   .inline-toolbar.toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .button.flat,
   .inline-toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .button.flat,
   .inline-toolbar.search-bar GtkToolButton:backdrop:last-child:dir(rtl) > .button.flat,
   .inline-toolbar.location-bar GtkToolButton:backdrop:last-child:dir(rtl) > .button.flat,
+  .inline-toolbar.toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar.search-bar GtkToolButton:backdrop:last-child:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar.location-bar GtkToolButton:backdrop:last-child:dir(rtl) > .sidebar-button.button,
   .inline-toolbar .header-bar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton,
   .header-bar .inline-toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton,
   .titlebar .inline-toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton, 
GtkComboBox.combobox-entry .entry:last-child:dir(rtl), GtkComboBox.combobox-entry 
.button:last-child:dir(rtl), .linked > GtkComboBox:last-child > .button:dir(rtl) {
     border-right-style: solid; }
 .osd .button:only-child:hover, .osd .button:only-child:active, .osd .button:only-child:checked, .osd 
.button:only-child:insensitive, .osd .button:only-child:backdrop, .osd .button.suggested-action:only-child, 
.osd .button.destructive-action:only-child, .inline-toolbar .button:only-child, .linked > .button:only-child, 
.header-bar .linked > .button.titlebutton:only-child,
-.titlebar .linked > .button.titlebutton:only-child, .inline-toolbar.toolbar GtkToolButton:only-child > 
.button.flat, .inline-toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:only-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:only-child > 
.button.flat, .inline-toolbar .header-bar GtkToolButton:only-child > .button.titlebutton, .header-bar 
.inline-toolbar GtkToolButton:only-child > .button.titlebutton,
+.titlebar .linked > .button.titlebutton:only-child, .inline-toolbar.toolbar GtkToolButton:only-child > 
.button.flat, .inline-toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:only-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:only-child > 
.button.flat, .inline-toolbar.toolbar GtkToolButton:only-child > .sidebar-button.button, .inline-toolbar 
GtkToolButton:only-child > .sidebar-button.button, .inline-toolbar.search-bar GtkToolButton:only-child > 
.sidebar-button.button, .inline-toolbar.location-bar GtkToolButton:only-child > .sidebar-button.button, 
.inline-toolbar .header-bar GtkToolButton:only-child > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton:only-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:only-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:only-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:only-child > .button.flat,
 .inline-toolbar GtkToolButton:backdrop:only-child > .button.flat,
 .inline-toolbar.search-bar GtkToolButton:backdrop:only-child > .button.flat,
 .inline-toolbar.location-bar GtkToolButton:backdrop:only-child > .button.flat,
+.inline-toolbar.toolbar GtkToolButton:backdrop:only-child > .sidebar-button.button,
+.inline-toolbar GtkToolButton:backdrop:only-child > .sidebar-button.button,
+.inline-toolbar.search-bar GtkToolButton:backdrop:only-child > .sidebar-button.button,
+.inline-toolbar.location-bar GtkToolButton:backdrop:only-child > .sidebar-button.button,
 .inline-toolbar .header-bar GtkToolButton:backdrop:only-child > .button.titlebutton,
 .header-bar .inline-toolbar GtkToolButton:backdrop:only-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:backdrop:only-child > .button.titlebutton,
@@ -1180,8 +1206,9 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   border-radius: 3px;
   border-style: solid; }
 
-.menuitem.button.flat, .header-bar .menuitem.titlebutton.button,
-.titlebar .menuitem.titlebutton.button, .menuitem.button.flat:backdrop, 
.menuitem.button.flat:backdrop:hover, .header-bar .menuitem.titlebutton.button:backdrop:hover,
+.menuitem.button.flat, .menuitem.sidebar-button.button, .header-bar .menuitem.titlebutton.button,
+.titlebar .menuitem.titlebutton.button, .menuitem.button.flat:backdrop, 
.menuitem.sidebar-button.button:backdrop, .header-bar .menuitem.titlebutton.button:backdrop,
+.titlebar .menuitem.titlebutton.button:backdrop, .menuitem.button.flat:backdrop:hover, 
.menuitem.sidebar-button.button:backdrop:hover, .header-bar .menuitem.titlebutton.button:backdrop:hover,
 .titlebar .menuitem.titlebutton.button:backdrop:hover, .button:link, .header-bar .button.titlebutton:link,
 .titlebar .button.titlebutton:link, .button:visited, .header-bar .button.titlebutton:visited,
 .titlebar .button.titlebutton:visited, .button:link:hover, .button:link:active, .button:link:checked, 
.button:visited:hover, .button:visited:active, .button:visited:checked, .button:link:backdrop, 
.button:visited:backdrop, .menu.button, .header-bar .menu.button.titlebutton,
@@ -1196,24 +1223,42 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
 .list-row.button:backdrop:insensitive:active,
 .list-row.button:backdrop:insensitive:checked,
 .list-row.button:insensitive:active,
-.list-row.button:insensitive:checked, .app-notification .button.flat, .app-notification .header-bar 
.titlebutton.button, .header-bar .app-notification .titlebutton.button,
+.list-row.button:insensitive:checked, .app-notification .button.flat, .app-notification 
.sidebar-button.button, .app-notification .header-bar .titlebutton.button, .header-bar .app-notification 
.titlebutton.button,
 .app-notification .titlebar .titlebutton.button,
 .titlebar .app-notification .titlebutton.button,
-.app-notification.frame .button.flat, .app-notification .button.flat:backdrop, .app-notification 
.button.flat:insensitive, .app-notification .button.flat:backdrop:insensitive, .app-notification .header-bar 
.titlebutton.button:backdrop:insensitive, .header-bar .app-notification 
.titlebutton.button:backdrop:insensitive,
+.app-notification.frame .button.flat,
+.app-notification.frame .sidebar-button.button,
+.app-notification.frame .header-bar .button.titlebutton,
+.header-bar .app-notification.frame .button.titlebutton,
+.app-notification.frame .titlebar .button.titlebutton,
+.titlebar .app-notification.frame .button.titlebutton, .app-notification .button.flat:backdrop, 
.app-notification .sidebar-button.button:backdrop, .app-notification .header-bar 
.titlebutton.button:backdrop, .header-bar .app-notification .titlebutton.button:backdrop,
+.app-notification .titlebar .titlebutton.button:backdrop,
+.titlebar .app-notification .titlebutton.button:backdrop, .app-notification .button.flat:insensitive, 
.app-notification .sidebar-button.button:insensitive, .app-notification .header-bar 
.titlebutton.button:insensitive, .header-bar .app-notification .titlebutton.button:insensitive,
+.app-notification .titlebar .titlebutton.button:insensitive,
+.titlebar .app-notification .titlebutton.button:insensitive, .app-notification 
.button.flat:backdrop:insensitive, .app-notification .sidebar-button.button:backdrop:insensitive, 
.app-notification .header-bar .titlebutton.button:backdrop:insensitive, .header-bar .app-notification 
.titlebutton.button:backdrop:insensitive,
 .app-notification .titlebar .titlebutton.button:backdrop:insensitive,
 .titlebar .app-notification .titlebutton.button:backdrop:insensitive,
 .app-notification.frame .button.flat:backdrop,
+.app-notification.frame .sidebar-button.button:backdrop,
 .app-notification.frame .header-bar .button.titlebutton:backdrop,
 .header-bar .app-notification.frame .button.titlebutton:backdrop,
 .app-notification.frame .titlebar .button.titlebutton:backdrop,
 .titlebar .app-notification.frame .button.titlebutton:backdrop,
 .app-notification.frame .button.flat:insensitive,
+.app-notification.frame .sidebar-button.button:insensitive,
 .app-notification.frame .header-bar .button.titlebutton:insensitive,
 .header-bar .app-notification.frame .button.titlebutton:insensitive,
 .app-notification.frame .titlebar .button.titlebutton:insensitive,
 .titlebar .app-notification.frame .button.titlebutton:insensitive,
-.app-notification.frame .button.flat:backdrop:insensitive, GtkCalendar.button, .header-bar 
GtkCalendar.button.titlebutton,
-.titlebar GtkCalendar.button.titlebutton, GtkCalendar.button:hover, GtkCalendar.button:backdrop, 
.scale-popup .button:hover, .scale-popup .button:backdrop, .scale-popup .button:backdrop:hover, .scale-popup 
.button:backdrop:insensitive {
+.app-notification.frame .button.flat:backdrop:insensitive,
+.app-notification.frame .sidebar-button.button:backdrop:insensitive,
+.app-notification.frame .header-bar .button.titlebutton:backdrop:insensitive,
+.header-bar .app-notification.frame .button.titlebutton:backdrop:insensitive,
+.app-notification.frame .titlebar .button.titlebutton:backdrop:insensitive,
+.titlebar .app-notification.frame .button.titlebutton:backdrop:insensitive, GtkCalendar.button, .header-bar 
GtkCalendar.button.titlebutton,
+.titlebar GtkCalendar.button.titlebutton, GtkCalendar.button:hover, .header-bar 
GtkCalendar.button.titlebutton:hover,
+.titlebar GtkCalendar.button.titlebutton:hover, GtkCalendar.button:backdrop, .header-bar 
GtkCalendar.button.titlebutton:backdrop,
+.titlebar GtkCalendar.button.titlebutton:backdrop, .scale-popup .button:hover, .scale-popup 
.button:backdrop, .scale-popup .button:backdrop:hover, .scale-popup .button:backdrop:insensitive {
   border-color: transparent;
   background-color: transparent;
   background-image: none;
@@ -1222,10 +1267,10 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   icon-shadow: none; }
 
 /* menu buttons */
-.menuitem.button.flat, .header-bar .menuitem.titlebutton.button,
+.menuitem.button.flat, .menuitem.sidebar-button.button, .header-bar .menuitem.titlebutton.button,
 .titlebar .menuitem.titlebutton.button {
   outline-offset: -1px; }
-  .menuitem.button.flat:hover, .header-bar .menuitem.titlebutton.button:hover,
+  .menuitem.button.flat:hover, .menuitem.sidebar-button.button:hover, .header-bar 
.menuitem.titlebutton.button:hover,
   .titlebar .menuitem.titlebutton.button:hover {
     background-color: #4b5050; }
 
@@ -1497,7 +1542,7 @@ GtkComboBox {
     color: #5d6767; }
   GtkComboBox .menuitem {
     text-shadow: none; }
-  GtkComboBox .separator.vertical, GtkComboBox GtkPlacesSidebar.sidebar .view .vertical.separator, 
GtkPlacesSidebar.sidebar .view GtkComboBox .vertical.separator {
+  GtkComboBox .separator.vertical {
     -GtkWidget-wide-separators: true; }
 
 /************
@@ -1562,10 +1607,8 @@ GtkComboBox {
     padding-left: 12px;
     padding-right: 12px; }
   .titlebar .header-bar-separator, .titlebar > GtkBox > .separator.vertical,
-  GtkPlacesSidebar.sidebar .view .titlebar > GtkBox > .vertical.separator:backdrop,
   .header-bar .header-bar-separator,
-  .header-bar > GtkBox > .separator.vertical,
-  GtkPlacesSidebar.sidebar .view .header-bar > GtkBox > .vertical.separator:backdrop {
+  .header-bar > GtkBox > .separator.vertical {
     -GtkWidget-wide-separators: true;
     -GtkWidget-separator-width: 1px;
     border-width: 0 1px;
@@ -1594,9 +1637,10 @@ GtkComboBox {
       text-shadow: 0 -1px rgba(0, 0, 0, 0.70353);
       icon-shadow: 0 -1px rgba(0, 0, 0, 0.70353);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.1), 0 1px rgba(43, 100, 160, 0.55); }
-      .titlebar.selection-mode .button.flat,
+      .titlebar.selection-mode .button.flat, .titlebar.selection-mode .sidebar-button.button,
       .titlebar.selection-mode .titlebutton.button,
       .header-bar.selection-mode .button.flat,
+      .header-bar.selection-mode .sidebar-button.button,
       .header-bar.selection-mode .titlebutton.button {
         border-color: transparent;
         background-color: transparent;
@@ -1623,10 +1667,11 @@ GtkComboBox {
         text-shadow: 0 -1px rgba(0, 0, 0, 0.78353);
         icon-shadow: 0 -1px rgba(0, 0, 0, 0.78353);
         box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6), 0 1px rgba(43, 
100, 160, 0.55); }
-      .titlebar.selection-mode .button:backdrop, .titlebar.selection-mode .button.flat:backdrop,
+      .titlebar.selection-mode .button:backdrop, .titlebar.selection-mode .button.flat:backdrop, 
.titlebar.selection-mode .sidebar-button.button:backdrop,
       .titlebar.selection-mode .titlebutton.button:backdrop,
       .header-bar.selection-mode .button:backdrop,
       .header-bar.selection-mode .button.flat:backdrop,
+      .header-bar.selection-mode .sidebar-button.button:backdrop,
       .header-bar.selection-mode .titlebutton.button:backdrop {
         color: #d2deeb;
         border-color: #0b1e33;
@@ -1636,24 +1681,27 @@ GtkComboBox {
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(43, 100, 160, 0);
         -gtk-image-effect: none;
         border-color: #0f2b48; }
-        .titlebar.selection-mode .button:backdrop:active, .titlebar.selection-mode .button:backdrop:checked, 
.titlebar.selection-mode .button.flat:backdrop:active,
-        .titlebar.selection-mode .titlebutton.button:backdrop:active, .titlebar.selection-mode 
.button.flat:backdrop:checked,
+        .titlebar.selection-mode .button:backdrop:active, .titlebar.selection-mode .button:backdrop:checked, 
.titlebar.selection-mode .button.flat:backdrop:active, .titlebar.selection-mode 
.sidebar-button.button:backdrop:active,
+        .titlebar.selection-mode .titlebutton.button:backdrop:active, .titlebar.selection-mode 
.button.flat:backdrop:checked, .titlebar.selection-mode .sidebar-button.button:backdrop:checked,
         .titlebar.selection-mode .titlebutton.button:backdrop:checked,
         .header-bar.selection-mode .button:backdrop:active,
         .header-bar.selection-mode .button:backdrop:checked,
         .header-bar.selection-mode .button.flat:backdrop:active,
+        .header-bar.selection-mode .sidebar-button.button:backdrop:active,
         .header-bar.selection-mode .titlebutton.button:backdrop:active,
         .header-bar.selection-mode .button.flat:backdrop:checked,
+        .header-bar.selection-mode .sidebar-button.button:backdrop:checked,
         .header-bar.selection-mode .titlebutton.button:backdrop:checked {
           color: #d0d9e2;
           border-color: #0b1e33;
           background-image: linear-gradient(to bottom, #184472);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(43, 100, 160, 0);
           border-color: #0f2b48; }
-        .titlebar.selection-mode .button:backdrop:insensitive, .titlebar.selection-mode 
.button.flat:backdrop:insensitive,
+        .titlebar.selection-mode .button:backdrop:insensitive, .titlebar.selection-mode 
.button.flat:backdrop:insensitive, .titlebar.selection-mode .sidebar-button.button:backdrop:insensitive,
         .titlebar.selection-mode .titlebutton.button:backdrop:insensitive,
         .header-bar.selection-mode .button:backdrop:insensitive,
         .header-bar.selection-mode .button.flat:backdrop:insensitive,
+        .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive,
         .header-bar.selection-mode .titlebutton.button:backdrop:insensitive {
           color: #6f90b2;
           border-color: #0b1e33;
@@ -1662,51 +1710,59 @@ GtkComboBox {
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(43, 100, 160, 0);
           border-color: #0f2b48; }
-          .titlebar.selection-mode .button:backdrop:insensitive > .label, .titlebar.selection-mode 
.header-bar .button.titlebutton:backdrop:insensitive > .label, .titlebar.selection-mode 
.button.flat:backdrop:insensitive > .label, .titlebar.selection-mode .header-bar 
.titlebutton.button:backdrop:insensitive > .label,
+          .titlebar.selection-mode .button:backdrop:insensitive > .label, .titlebar.selection-mode 
.header-bar .button.titlebutton:backdrop:insensitive > .label, .titlebar.selection-mode 
.button.flat:backdrop:insensitive > .label, .titlebar.selection-mode 
.sidebar-button.button:backdrop:insensitive > .label, .titlebar.selection-mode .header-bar 
.titlebutton.button:backdrop:insensitive > .label,
           .titlebar.selection-mode .titlebutton.button:backdrop:insensitive > .label,
           .header-bar.selection-mode .button:backdrop:insensitive > .label,
           .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive > .label,
+          .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive > .label,
           .header-bar.selection-mode .titlebutton.button:backdrop:insensitive > .label,
           .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive > .label {
             color: inherit; }
-        .titlebar.selection-mode .button:backdrop:insensitive:active, .titlebar.selection-mode 
.button:backdrop:insensitive:checked, .titlebar.selection-mode .button.flat:backdrop:insensitive:active,
-        .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active, .titlebar.selection-mode 
.button.flat:backdrop:insensitive:checked,
+        .titlebar.selection-mode .button:backdrop:insensitive:active, .titlebar.selection-mode 
.button:backdrop:insensitive:checked, .titlebar.selection-mode .button.flat:backdrop:insensitive:active, 
.titlebar.selection-mode .sidebar-button.button:backdrop:insensitive:active,
+        .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active, .titlebar.selection-mode 
.button.flat:backdrop:insensitive:checked, .titlebar.selection-mode 
.sidebar-button.button:backdrop:insensitive:checked,
         .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:checked,
         .header-bar.selection-mode .button:backdrop:insensitive:active,
         .header-bar.selection-mode .button:backdrop:insensitive:checked,
         .header-bar.selection-mode .button.flat:backdrop:insensitive:active,
+        .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive:active,
         .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:active,
         .header-bar.selection-mode .button.flat:backdrop:insensitive:checked,
+        .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive:checked,
         .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:checked {
           color: #6c88a5;
           border-color: #0b1e33;
           background-image: linear-gradient(to bottom, #1d4876);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(43, 100, 160, 0);
           border-color: #0f2b48; }
-          .titlebar.selection-mode .button:backdrop:insensitive:active > .label, .titlebar.selection-mode 
.header-bar .button.titlebutton:backdrop:insensitive:active > .label, .titlebar.selection-mode 
.button:backdrop:insensitive:checked > .label, .titlebar.selection-mode .header-bar 
.button.titlebutton:backdrop:insensitive:checked > .label, .titlebar.selection-mode 
.button.flat:backdrop:insensitive:active > .label, .titlebar.selection-mode .header-bar 
.titlebutton.button:backdrop:insensitive:active > .label,
-          .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label, 
.titlebar.selection-mode .button.flat:backdrop:insensitive:checked > .label, .titlebar.selection-mode 
.header-bar .titlebutton.button:backdrop:insensitive:checked > .label,
+          .titlebar.selection-mode .button:backdrop:insensitive:active > .label, .titlebar.selection-mode 
.header-bar .button.titlebutton:backdrop:insensitive:active > .label, .titlebar.selection-mode 
.button:backdrop:insensitive:checked > .label, .titlebar.selection-mode .header-bar 
.button.titlebutton:backdrop:insensitive:checked > .label, .titlebar.selection-mode 
.button.flat:backdrop:insensitive:active > .label, .titlebar.selection-mode 
.sidebar-button.button:backdrop:insensitive:active > .label, .titlebar.selection-mode .header-bar 
.titlebutton.button:backdrop:insensitive:active > .label,
+          .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label, 
.titlebar.selection-mode .button.flat:backdrop:insensitive:checked > .label, .titlebar.selection-mode 
.sidebar-button.button:backdrop:insensitive:checked > .label, .titlebar.selection-mode .header-bar 
.titlebutton.button:backdrop:insensitive:checked > .label,
           .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .button:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .button:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive:active > .label,
+          .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive:checked > .label,
+          .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
-      .titlebar.selection-mode .button.flat:backdrop,
-      .titlebar.selection-mode .titlebutton.button:backdrop, .titlebar.selection-mode 
.button.flat:insensitive,
-      .titlebar.selection-mode .titlebutton.button:insensitive, .titlebar.selection-mode 
.button.flat:insensitive:backdrop,
+      .titlebar.selection-mode .button.flat:backdrop, .titlebar.selection-mode 
.sidebar-button.button:backdrop,
+      .titlebar.selection-mode .titlebutton.button:backdrop, .titlebar.selection-mode 
.button.flat:insensitive, .titlebar.selection-mode .sidebar-button.button:insensitive,
+      .titlebar.selection-mode .titlebutton.button:insensitive, .titlebar.selection-mode 
.button.flat:insensitive:backdrop, .titlebar.selection-mode .sidebar-button.button:insensitive:backdrop,
       .titlebar.selection-mode .titlebutton.button:insensitive:backdrop,
       .header-bar.selection-mode .button.flat:backdrop,
+      .header-bar.selection-mode .sidebar-button.button:backdrop,
       .header-bar.selection-mode .titlebutton.button:backdrop,
       .header-bar.selection-mode .button.flat:insensitive,
+      .header-bar.selection-mode .sidebar-button.button:insensitive,
       .header-bar.selection-mode .titlebutton.button:insensitive,
       .header-bar.selection-mode .button.flat:insensitive:backdrop,
+      .header-bar.selection-mode .sidebar-button.button:insensitive:backdrop,
       .header-bar.selection-mode .titlebutton.button:insensitive:backdrop {
         border-color: transparent;
         background-color: transparent;
@@ -2067,10 +2123,11 @@ column-header .titlebar .button.titlebutton,
   .popover > .location-bar, .popover.osd > .toolbar, .popover.osd > .inline-toolbar, .popover.osd > 
.search-bar, .popover.osd > .location-bar {
     border-style: none;
     background-color: transparent; }
-  .popover .button.flat, .popover .header-bar .titlebutton.button, .header-bar .popover .titlebutton.button,
+  .popover .button.flat, .popover .sidebar-button.button, .popover .header-bar .titlebutton.button, 
.header-bar .popover .titlebutton.button,
   .popover .titlebar .titlebutton.button,
   .titlebar .popover .titlebutton.button,
   .popover .button.flat:hover,
+  .popover .sidebar-button.button:hover,
   .popover .header-bar .titlebutton.button:hover,
   .header-bar .popover .titlebutton.button:hover,
   .popover .titlebar .titlebutton.button:hover,
@@ -2543,126 +2600,126 @@ GtkSwitch {
 .check {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked-dark.png"), 
url("assets/checkbox-unchecked-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check.button.flat, .header-bar .check.titlebutton.button,
+  .check.button.flat, .check.sidebar-button.button, .header-bar .check.titlebutton.button,
   .titlebar .check.titlebutton.button {
     icon-shadow: none; }
 
 .check:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked-hover-dark.png"), 
url("assets/checkbox-unchecked-hover-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check:hover.button.flat, .header-bar .check.titlebutton.button:hover,
+  .check:hover.button.flat, .check.sidebar-button.button:hover, .header-bar .check.titlebutton.button:hover,
   .titlebar .check.titlebutton.button:hover {
     icon-shadow: none; }
 
 .check:active {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked-active-dark.png"), 
url("assets/checkbox-unchecked-active-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check:active.button.flat, .header-bar .check.titlebutton.button:active,
+  .check:active.button.flat, .check.sidebar-button.button:active, .header-bar 
.check.titlebutton.button:active,
   .titlebar .check.titlebutton.button:active {
     icon-shadow: none; }
 
 .check:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked-insensitive-dark.png"), 
url("assets/checkbox-unchecked-insensitive-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check:insensitive.button.flat, .header-bar .check.titlebutton.button:insensitive,
+  .check:insensitive.button.flat, .check.sidebar-button.button:insensitive, .header-bar 
.check.titlebutton.button:insensitive,
   .titlebar .check.titlebutton.button:insensitive {
     icon-shadow: none; }
 
 .check:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked-backdrop-dark.png"), 
url("assets/checkbox-unchecked-backdrop-dark 2 png"));
   icon-shadow: none; }
-  .check:backdrop.button.flat, .header-bar .check.titlebutton.button:backdrop,
+  .check:backdrop.button.flat, .check.sidebar-button.button:backdrop, .header-bar 
.check.titlebutton.button:backdrop,
   .titlebar .check.titlebutton.button:backdrop {
     icon-shadow: none; }
 
 .check:backdrop:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked-backdrop-insensitive-dark.png"), 
url("assets/checkbox-unchecked-backdrop-insensitive-dark 2 png"));
   icon-shadow: none; }
-  .check:backdrop:insensitive.button.flat, .header-bar .check.titlebutton.button:backdrop:insensitive,
+  .check:backdrop:insensitive.button.flat, .check.sidebar-button.button:backdrop:insensitive, .header-bar 
.check.titlebutton.button:backdrop:insensitive,
   .titlebar .check.titlebutton.button:backdrop:insensitive {
     icon-shadow: none; }
 
 .check:inconsistent {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed-dark.png"), url("assets/checkbox-mixed-dark 2 
png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check:inconsistent.button.flat, .header-bar .check.titlebutton.button:inconsistent,
+  .check:inconsistent.button.flat, .check.sidebar-button.button:inconsistent, .header-bar 
.check.titlebutton.button:inconsistent,
   .titlebar .check.titlebutton.button:inconsistent {
     icon-shadow: none; }
 
 .check:inconsistent:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed-hover-dark.png"), 
url("assets/checkbox-mixed-hover-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check:inconsistent:hover.button.flat, .header-bar .check.titlebutton.button:inconsistent:hover,
+  .check:inconsistent:hover.button.flat, .check.sidebar-button.button:inconsistent:hover, .header-bar 
.check.titlebutton.button:inconsistent:hover,
   .titlebar .check.titlebutton.button:inconsistent:hover {
     icon-shadow: none; }
 
 .check:inconsistent:selected {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed-active-dark.png"), 
url("assets/checkbox-mixed-active-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check:inconsistent:selected.button.flat, .header-bar .check.titlebutton.button:inconsistent:selected,
+  .check:inconsistent:selected.button.flat, .check.sidebar-button.button:inconsistent:selected, .header-bar 
.check.titlebutton.button:inconsistent:selected,
   .titlebar .check.titlebutton.button:inconsistent:selected {
     icon-shadow: none; }
 
 .check:inconsistent:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed-backdrop-dark.png"), 
url("assets/checkbox-mixed-backdrop-dark 2 png"));
   icon-shadow: none; }
-  .check:inconsistent:backdrop.button.flat, .header-bar .check.titlebutton.button:inconsistent:backdrop,
+  .check:inconsistent:backdrop.button.flat, .check.sidebar-button.button:inconsistent:backdrop, .header-bar 
.check.titlebutton.button:inconsistent:backdrop,
   .titlebar .check.titlebutton.button:inconsistent:backdrop {
     icon-shadow: none; }
 
 .check:inconsistent:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed-insensitive-dark.png"), 
url("assets/checkbox-mixed-insensitive-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check:inconsistent:insensitive.button.flat, .header-bar 
.check.titlebutton.button:inconsistent:insensitive,
+  .check:inconsistent:insensitive.button.flat, .check.sidebar-button.button:inconsistent:insensitive, 
.header-bar .check.titlebutton.button:inconsistent:insensitive,
   .titlebar .check.titlebutton.button:inconsistent:insensitive {
     icon-shadow: none; }
 
 .check:inconsistent:insensitive:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed-backdrop-insensitive-dark.png"), 
url("assets/checkbox-mixed-backdrop-insensitive-dark 2 png"));
   icon-shadow: none; }
-  .check:inconsistent:insensitive:backdrop.button.flat, .header-bar 
.check.titlebutton.button:inconsistent:insensitive:backdrop,
+  .check:inconsistent:insensitive:backdrop.button.flat, 
.check.sidebar-button.button:inconsistent:insensitive:backdrop, .header-bar 
.check.titlebutton.button:inconsistent:insensitive:backdrop,
   .titlebar .check.titlebutton.button:inconsistent:insensitive:backdrop {
     icon-shadow: none; }
 
 .check:checked {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked-dark.png"), url("assets/checkbox-checked-dark 2 
png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check:checked.button.flat, .header-bar .check.titlebutton.button:checked,
+  .check:checked.button.flat, .check.sidebar-button.button:checked, .header-bar 
.check.titlebutton.button:checked,
   .titlebar .check.titlebutton.button:checked {
     icon-shadow: none; }
 
 .check:checked:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked-insensitive-dark.png"), 
url("assets/checkbox-checked-insensitive-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check:checked:insensitive.button.flat, .header-bar .check.titlebutton.button:checked:insensitive,
+  .check:checked:insensitive.button.flat, .check.sidebar-button.button:checked:insensitive, .header-bar 
.check.titlebutton.button:checked:insensitive,
   .titlebar .check.titlebutton.button:checked:insensitive {
     icon-shadow: none; }
 
 .check:checked:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked-hover-dark.png"), 
url("assets/checkbox-checked-hover-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check:checked:hover.button.flat, .header-bar .check.titlebutton.button:checked:hover,
+  .check:checked:hover.button.flat, .check.sidebar-button.button:checked:hover, .header-bar 
.check.titlebutton.button:checked:hover,
   .titlebar .check.titlebutton.button:checked:hover {
     icon-shadow: none; }
 
 .check:checked:active {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked-active-dark.png"), 
url("assets/checkbox-checked-active-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .check:checked:active.button.flat, .header-bar .check.titlebutton.button:checked:active,
+  .check:checked:active.button.flat, .check.sidebar-button.button:checked:active, .header-bar 
.check.titlebutton.button:checked:active,
   .titlebar .check.titlebutton.button:checked:active {
     icon-shadow: none; }
 
 .check:backdrop:checked {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked-backdrop-dark.png"), 
url("assets/checkbox-checked-backdrop-dark 2 png"));
   icon-shadow: none; }
-  .check:backdrop:checked.button.flat, .header-bar .check.titlebutton.button:backdrop:checked,
+  .check:backdrop:checked.button.flat, .check.sidebar-button.button:backdrop:checked, .header-bar 
.check.titlebutton.button:backdrop:checked,
   .titlebar .check.titlebutton.button:backdrop:checked {
     icon-shadow: none; }
 
 .check:backdrop:checked:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked-backdrop-insensitive-dark.png"), 
url("assets/checkbox-checked-backdrop-insensitive-dark 2 png"));
   icon-shadow: none; }
-  .check:backdrop:checked:insensitive.button.flat, .header-bar 
.check.titlebutton.button:backdrop:checked:insensitive,
+  .check:backdrop:checked:insensitive.button.flat, 
.check.sidebar-button.button:backdrop:checked:insensitive, .header-bar 
.check.titlebutton.button:backdrop:checked:insensitive,
   .titlebar .check.titlebutton.button:backdrop:checked:insensitive {
     icon-shadow: none; }
 
@@ -2682,126 +2739,126 @@ GtkSwitch {
 .radio {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked-dark.png"), url("assets/radio-unchecked-dark 2 
png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio.button.flat, .header-bar .radio.titlebutton.button,
+  .radio.button.flat, .radio.sidebar-button.button, .header-bar .radio.titlebutton.button,
   .titlebar .radio.titlebutton.button {
     icon-shadow: none; }
 
 .radio:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked-hover-dark.png"), 
url("assets/radio-unchecked-hover-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio:hover.button.flat, .header-bar .radio.titlebutton.button:hover,
+  .radio:hover.button.flat, .radio.sidebar-button.button:hover, .header-bar .radio.titlebutton.button:hover,
   .titlebar .radio.titlebutton.button:hover {
     icon-shadow: none; }
 
 .radio:active {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked-active-dark.png"), 
url("assets/radio-unchecked-active-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio:active.button.flat, .header-bar .radio.titlebutton.button:active,
+  .radio:active.button.flat, .radio.sidebar-button.button:active, .header-bar 
.radio.titlebutton.button:active,
   .titlebar .radio.titlebutton.button:active {
     icon-shadow: none; }
 
 .radio:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked-insensitive-dark.png"), 
url("assets/radio-unchecked-insensitive-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio:insensitive.button.flat, .header-bar .radio.titlebutton.button:insensitive,
+  .radio:insensitive.button.flat, .radio.sidebar-button.button:insensitive, .header-bar 
.radio.titlebutton.button:insensitive,
   .titlebar .radio.titlebutton.button:insensitive {
     icon-shadow: none; }
 
 .radio:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked-backdrop-dark.png"), 
url("assets/radio-unchecked-backdrop-dark 2 png"));
   icon-shadow: none; }
-  .radio:backdrop.button.flat, .header-bar .radio.titlebutton.button:backdrop,
+  .radio:backdrop.button.flat, .radio.sidebar-button.button:backdrop, .header-bar 
.radio.titlebutton.button:backdrop,
   .titlebar .radio.titlebutton.button:backdrop {
     icon-shadow: none; }
 
 .radio:backdrop:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked-backdrop-insensitive-dark.png"), 
url("assets/radio-unchecked-backdrop-insensitive-dark 2 png"));
   icon-shadow: none; }
-  .radio:backdrop:insensitive.button.flat, .header-bar .radio.titlebutton.button:backdrop:insensitive,
+  .radio:backdrop:insensitive.button.flat, .radio.sidebar-button.button:backdrop:insensitive, .header-bar 
.radio.titlebutton.button:backdrop:insensitive,
   .titlebar .radio.titlebutton.button:backdrop:insensitive {
     icon-shadow: none; }
 
 .radio:inconsistent {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed-dark.png"), url("assets/radio-mixed-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio:inconsistent.button.flat, .header-bar .radio.titlebutton.button:inconsistent,
+  .radio:inconsistent.button.flat, .radio.sidebar-button.button:inconsistent, .header-bar 
.radio.titlebutton.button:inconsistent,
   .titlebar .radio.titlebutton.button:inconsistent {
     icon-shadow: none; }
 
 .radio:inconsistent:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed-hover-dark.png"), url("assets/radio-mixed-hover-dark 
2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio:inconsistent:hover.button.flat, .header-bar .radio.titlebutton.button:inconsistent:hover,
+  .radio:inconsistent:hover.button.flat, .radio.sidebar-button.button:inconsistent:hover, .header-bar 
.radio.titlebutton.button:inconsistent:hover,
   .titlebar .radio.titlebutton.button:inconsistent:hover {
     icon-shadow: none; }
 
 .radio:inconsistent:selected {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed-active-dark.png"), 
url("assets/radio-mixed-active-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio:inconsistent:selected.button.flat, .header-bar .radio.titlebutton.button:inconsistent:selected,
+  .radio:inconsistent:selected.button.flat, .radio.sidebar-button.button:inconsistent:selected, .header-bar 
.radio.titlebutton.button:inconsistent:selected,
   .titlebar .radio.titlebutton.button:inconsistent:selected {
     icon-shadow: none; }
 
 .radio:inconsistent:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed-backdrop-dark.png"), 
url("assets/radio-mixed-backdrop-dark 2 png"));
   icon-shadow: none; }
-  .radio:inconsistent:backdrop.button.flat, .header-bar .radio.titlebutton.button:inconsistent:backdrop,
+  .radio:inconsistent:backdrop.button.flat, .radio.sidebar-button.button:inconsistent:backdrop, .header-bar 
.radio.titlebutton.button:inconsistent:backdrop,
   .titlebar .radio.titlebutton.button:inconsistent:backdrop {
     icon-shadow: none; }
 
 .radio:inconsistent:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed-insensitive-dark.png"), 
url("assets/radio-mixed-insensitive-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio:inconsistent:insensitive.button.flat, .header-bar 
.radio.titlebutton.button:inconsistent:insensitive,
+  .radio:inconsistent:insensitive.button.flat, .radio.sidebar-button.button:inconsistent:insensitive, 
.header-bar .radio.titlebutton.button:inconsistent:insensitive,
   .titlebar .radio.titlebutton.button:inconsistent:insensitive {
     icon-shadow: none; }
 
 .radio:inconsistent:insensitive:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed-backdrop-insensitive-dark.png"), 
url("assets/radio-mixed-backdrop-insensitive-dark 2 png"));
   icon-shadow: none; }
-  .radio:inconsistent:insensitive:backdrop.button.flat, .header-bar 
.radio.titlebutton.button:inconsistent:insensitive:backdrop,
+  .radio:inconsistent:insensitive:backdrop.button.flat, 
.radio.sidebar-button.button:inconsistent:insensitive:backdrop, .header-bar 
.radio.titlebutton.button:inconsistent:insensitive:backdrop,
   .titlebar .radio.titlebutton.button:inconsistent:insensitive:backdrop {
     icon-shadow: none; }
 
 .radio:checked {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked-dark.png"), url("assets/radio-checked-dark 2 
png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio:checked.button.flat, .header-bar .radio.titlebutton.button:checked,
+  .radio:checked.button.flat, .radio.sidebar-button.button:checked, .header-bar 
.radio.titlebutton.button:checked,
   .titlebar .radio.titlebutton.button:checked {
     icon-shadow: none; }
 
 .radio:checked:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked-insensitive-dark.png"), 
url("assets/radio-checked-insensitive-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio:checked:insensitive.button.flat, .header-bar .radio.titlebutton.button:checked:insensitive,
+  .radio:checked:insensitive.button.flat, .radio.sidebar-button.button:checked:insensitive, .header-bar 
.radio.titlebutton.button:checked:insensitive,
   .titlebar .radio.titlebutton.button:checked:insensitive {
     icon-shadow: none; }
 
 .radio:checked:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked-hover-dark.png"), 
url("assets/radio-checked-hover-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio:checked:hover.button.flat, .header-bar .radio.titlebutton.button:checked:hover,
+  .radio:checked:hover.button.flat, .radio.sidebar-button.button:checked:hover, .header-bar 
.radio.titlebutton.button:checked:hover,
   .titlebar .radio.titlebutton.button:checked:hover {
     icon-shadow: none; }
 
 .radio:checked:active {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked-active-dark.png"), 
url("assets/radio-checked-active-dark 2 png"));
   icon-shadow: 0 1px 0 rgba(238, 238, 236, 0.1); }
-  .radio:checked:active.button.flat, .header-bar .radio.titlebutton.button:checked:active,
+  .radio:checked:active.button.flat, .radio.sidebar-button.button:checked:active, .header-bar 
.radio.titlebutton.button:checked:active,
   .titlebar .radio.titlebutton.button:checked:active {
     icon-shadow: none; }
 
 .radio:backdrop:checked {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked-backdrop-dark.png"), 
url("assets/radio-checked-backdrop-dark 2 png"));
   icon-shadow: none; }
-  .radio:backdrop:checked.button.flat, .header-bar .radio.titlebutton.button:backdrop:checked,
+  .radio:backdrop:checked.button.flat, .radio.sidebar-button.button:backdrop:checked, .header-bar 
.radio.titlebutton.button:backdrop:checked,
   .titlebar .radio.titlebutton.button:backdrop:checked {
     icon-shadow: none; }
 
 .radio:backdrop:checked:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked-backdrop-insensitive-dark.png"), 
url("assets/radio-checked-backdrop-insensitive-dark 2 png"));
   icon-shadow: none; }
-  .radio:backdrop:checked:insensitive.button.flat, .header-bar 
.radio.titlebutton.button:backdrop:checked:insensitive,
+  .radio:backdrop:checked:insensitive.button.flat, 
.radio.sidebar-button.button:backdrop:checked:insensitive, .header-bar 
.radio.titlebutton.button:backdrop:checked:insensitive,
   .titlebar .radio.titlebutton.button:backdrop:checked:insensitive {
     icon-shadow: none; }
 
@@ -3444,10 +3501,9 @@ GtkProgressBar {
 GtkScrolledWindow GtkViewport.frame {
   border-style: none; }
 
-.separator, GtkPlacesSidebar.sidebar .view .separator,
-GtkPlacesSidebar.sidebar .view .separator:backdrop {
+.separator {
   color: rgba(0, 0, 0, 0.1); }
-  GtkFileChooserButton .separator.vertical, GtkFileChooserButton GtkPlacesSidebar.sidebar .view 
.vertical.separator, GtkPlacesSidebar.sidebar .view GtkFileChooserButton .vertical.separator, GtkFontButton 
.separator.vertical, GtkFontButton GtkPlacesSidebar.sidebar .view .vertical.separator, 
GtkPlacesSidebar.sidebar .view GtkFontButton .vertical.separator {
+  GtkFileChooserButton .separator.vertical, GtkFontButton .separator.vertical {
     -GtkWidget-wide-separators: true; }
 
 /*********
@@ -3500,7 +3556,7 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
   text-shadow: 0 -1px rgba(0, 0, 0, 0.81176);
   icon-shadow: 0 -1px rgba(0, 0, 0, 0.81176);
   box-shadow: inset 0 1px rgba(255, 255, 255, 0.1); }
-  .list-row:selected .button.flat, .list-row:selected .header-bar .titlebutton.button, .header-bar 
.list-row:selected .titlebutton.button,
+  .list-row:selected .button.flat, .list-row:selected .sidebar-button.button, .list-row:selected .header-bar 
.titlebutton.button, .header-bar .list-row:selected .titlebutton.button,
   .list-row:selected .titlebar .titlebutton.button,
   .titlebar .list-row:selected .titlebutton.button {
     border-color: transparent;
@@ -3526,7 +3582,7 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
     text-shadow: 0 -1px rgba(0, 0, 0, 0.89176);
     icon-shadow: 0 -1px rgba(0, 0, 0, 0.89176);
     box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6); }
-  .list-row:selected .button:backdrop, .list-row:selected .button.flat:backdrop, .list-row:selected 
.header-bar .titlebutton.button:backdrop, .header-bar .list-row:selected .titlebutton.button:backdrop,
+  .list-row:selected .button:backdrop, .list-row:selected .button.flat:backdrop, .list-row:selected 
.sidebar-button.button:backdrop, .list-row:selected .header-bar .titlebutton.button:backdrop, .header-bar 
.list-row:selected .titlebutton.button:backdrop,
   .list-row:selected .titlebar .titlebutton.button:backdrop,
   .titlebar .list-row:selected .titlebutton.button:backdrop {
     color: #939695;
@@ -3535,16 +3591,16 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
     text-shadow: none;
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-    .list-row:selected .button:backdrop:active, .list-row:selected .button:backdrop:checked, 
.list-row:selected .button.flat:backdrop:active, .list-row:selected .header-bar 
.titlebutton.button:backdrop:active, .header-bar .list-row:selected .titlebutton.button:backdrop:active,
+    .list-row:selected .button:backdrop:active, .list-row:selected .button:backdrop:checked, 
.list-row:selected .button.flat:backdrop:active, .list-row:selected .sidebar-button.button:backdrop:active, 
.list-row:selected .header-bar .titlebutton.button:backdrop:active, .header-bar .list-row:selected 
.titlebutton.button:backdrop:active,
     .list-row:selected .titlebar .titlebutton.button:backdrop:active,
-    .titlebar .list-row:selected .titlebutton.button:backdrop:active, .list-row:selected 
.button.flat:backdrop:checked, .list-row:selected .header-bar .titlebutton.button:backdrop:checked, 
.header-bar .list-row:selected .titlebutton.button:backdrop:checked,
+    .titlebar .list-row:selected .titlebutton.button:backdrop:active, .list-row:selected 
.button.flat:backdrop:checked, .list-row:selected .sidebar-button.button:backdrop:checked, .list-row:selected 
.header-bar .titlebutton.button:backdrop:checked, .header-bar .list-row:selected 
.titlebutton.button:backdrop:checked,
     .list-row:selected .titlebar .titlebutton.button:backdrop:checked,
     .titlebar .list-row:selected .titlebutton.button:backdrop:checked {
       color: #939695;
       border-color: #1e2222;
       background-image: linear-gradient(to bottom, #2f3434);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-    .list-row:selected .button:backdrop:insensitive, .list-row:selected .button.flat:backdrop:insensitive, 
.list-row:selected .header-bar .titlebutton.button:backdrop:insensitive, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive,
+    .list-row:selected .button:backdrop:insensitive, .list-row:selected .button.flat:backdrop:insensitive, 
.list-row:selected .sidebar-button.button:backdrop:insensitive, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive,
     .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive,
     .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive {
       color: #5d6767;
@@ -3554,13 +3610,13 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
       .list-row:selected .button:backdrop:insensitive > .label, .list-row:selected .header-bar 
.button.titlebutton:backdrop:insensitive > .label,
-      .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive > .label, .list-row:selected 
.button.flat:backdrop:insensitive > .label, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive > .label, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive > .label,
+      .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive > .label, .list-row:selected 
.button.flat:backdrop:insensitive > .label, .list-row:selected .sidebar-button.button:backdrop:insensitive > 
.label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive > .label, .header-bar 
.list-row:selected .titlebutton.button:backdrop:insensitive > .label,
       .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive > .label,
       .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive > .label {
         color: inherit; }
-      .list-row:selected .button:backdrop:insensitive:active, .list-row:selected 
.button:backdrop:insensitive:checked, .list-row:selected .button.flat:backdrop:insensitive:active, 
.list-row:selected .header-bar .titlebutton.button:backdrop:insensitive:active, .header-bar 
.list-row:selected .titlebutton.button:backdrop:insensitive:active,
+      .list-row:selected .button:backdrop:insensitive:active, .list-row:selected 
.button:backdrop:insensitive:checked, .list-row:selected .button.flat:backdrop:insensitive:active, 
.list-row:selected .sidebar-button.button:backdrop:insensitive:active, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:active, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:active,
       .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:active,
-      .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:active, .list-row:selected 
.button.flat:backdrop:insensitive:checked, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:checked, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:checked,
+      .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:active, .list-row:selected 
.button.flat:backdrop:insensitive:checked, .list-row:selected 
.sidebar-button.button:backdrop:insensitive:checked, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:checked, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:checked,
       .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:checked,
       .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:checked {
         color: #5d6767;
@@ -3569,13 +3625,13 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
         .list-row:selected .button:backdrop:insensitive:active > .label, .list-row:selected .header-bar 
.button.titlebutton:backdrop:insensitive:active > .label,
         .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive:active > .label, 
.list-row:selected .button:backdrop:insensitive:checked > .label, .list-row:selected .header-bar 
.button.titlebutton:backdrop:insensitive:checked > .label,
-        .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, 
.list-row:selected .button.flat:backdrop:insensitive:active > .label, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:active > .label, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:active > .label,
+        .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, 
.list-row:selected .button.flat:backdrop:insensitive:active > .label, .list-row:selected 
.sidebar-button.button:backdrop:insensitive:active > .label, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:active > .label, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:active > .label,
         .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:active > .label,
-        .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:active > .label, 
.list-row:selected .button.flat:backdrop:insensitive:checked > .label, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:checked > .label, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:checked > .label,
+        .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:active > .label, 
.list-row:selected .button.flat:backdrop:insensitive:checked > .label, .list-row:selected 
.sidebar-button.button:backdrop:insensitive:checked > .label, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:checked > .label, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:checked > .label,
         .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:checked > .label,
         .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:checked > .label {
           color: inherit; }
-  .list-row:selected .button.flat:backdrop, .list-row:selected .header-bar .titlebutton.button:backdrop, 
.header-bar .list-row:selected .titlebutton.button:backdrop,
+  .list-row:selected .button.flat:backdrop, .list-row:selected .sidebar-button.button:backdrop, 
.list-row:selected .header-bar .titlebutton.button:backdrop, .header-bar .list-row:selected 
.titlebutton.button:backdrop,
   .list-row:selected .titlebar .titlebutton.button:backdrop,
   .titlebar .list-row:selected .titlebutton.button:backdrop {
     border-color: transparent;
@@ -3638,10 +3694,11 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
     text-shadow: 0 1px black;
     icon-shadow: 0 1px black;
     outline-color: rgba(238, 238, 236, 0.3); }
-    .app-notification .button.flat, .app-notification .header-bar .titlebutton.button, .header-bar 
.app-notification .titlebutton.button,
+    .app-notification .button.flat, .app-notification .sidebar-button.button, .app-notification .header-bar 
.titlebutton.button, .header-bar .app-notification .titlebutton.button,
     .app-notification .titlebar .titlebutton.button,
     .titlebar .app-notification .titlebutton.button,
     .app-notification.frame .button.flat,
+    .app-notification.frame .sidebar-button.button,
     .app-notification.frame .header-bar .titlebutton.button,
     .header-bar .app-notification.frame .titlebutton.button,
     .app-notification.frame .titlebar .titlebutton.button,
@@ -3931,27 +3988,31 @@ GtkFileChooserDialog .dialog-action-box {
   .sidebar:backdrop {
     background-color: #454c4c; }
 
-GtkPlacesSidebar.sidebar .view {
-  color: #eeeeec;
-  background-color: transparent; }
-  GtkPlacesSidebar.sidebar .view .image {
-    color: #bbbdbc; }
-    GtkPlacesSidebar.sidebar .view .image:selected {
-      color: #e8eef5; }
-      GtkPlacesSidebar.sidebar .view .image:selected:backdrop {
-        color: #e8eef5; }
-    GtkPlacesSidebar.sidebar .view .image:insensitive {
-      color: #7b7f7f; }
-    GtkPlacesSidebar.sidebar .view .image:backdrop {
-      color: #7b7f7f; }
-      GtkPlacesSidebar.sidebar .view .image:backdrop:insensitive {
-        color: #555e5e; }
-  GtkPlacesSidebar.sidebar .view:insensitive {
-    color: #939695; }
-  GtkPlacesSidebar.sidebar .view:backdrop {
-    color: #939695; }
-    GtkPlacesSidebar.sidebar .view:backdrop:insensitive {
-      color: #5d6767; }
+GtkPlacesSidebar.sidebar SidebarRow {
+  padding-left: 14px;
+  padding-right: 6px;
+  padding-top: 2px;
+  padding-bottom: 2px; }
+GtkPlacesSidebar.sidebar SidebarRow > GtkBox > GtkImage {
+  opacity: 0.7; }
+.sidebar-button.button, .header-bar .sidebar-button.button.titlebutton,
+.titlebar .sidebar-button.button.titlebutton {
+  border-radius: 100%;
+  outline-radius: 100%;
+  /*    &:hover:not(:active):not(:backdrop) {
+        background-image: none;
+        background-color: gtkalpha(currentColor, 0.1);
+        border-color: transparentize($borders_color, 1);
+        box-shadow: inset 0 0 transparentize(white, 1);
+        icon-shadow: none;
+      } */ }
+  .sidebar-button.button.image-button, .header-bar .sidebar-button.titlebutton.button,
+  .titlebar .sidebar-button.titlebutton.button {
+    padding: 6px; }
+  .sidebar-button.button:not(:hover):not(:active) > GtkImage, .header-bar 
.sidebar-button.button.titlebutton:not(:hover):not(:active) > GtkImage,
+  .titlebar .sidebar-button.button.titlebutton:not(:hover):not(:active) > GtkImage, 
.sidebar-button.button:backdrop > GtkImage, .header-bar .sidebar-button.button.titlebutton:backdrop > 
GtkImage,
+  .titlebar .sidebar-button.button.titlebutton:backdrop > GtkImage {
+    opacity: 0.7; }
 
 .sidebar-item {
   padding: 10px 4px; }
@@ -4308,12 +4369,12 @@ GtkVolumeButton.button, .header-bar GtkVolumeButton.button.titlebutton,
   .titlebar.selection-mode .titlebutton.button:backdrop {
     icon-shadow: none; }
 
-.view:selected, GtkCalendar:selected, .label:selected, .label:selected:focus, .label:selected:hover, 
.grid-child:selected, .entry:selected, .entry:selected:focus, .menuitem.button.flat:selected, .header-bar 
.menuitem.titlebutton.button:selected,
-.titlebar .menuitem.titlebutton.button:selected, .list-row:selected, .sidebar:selected, 
GtkPlacesSidebar.sidebar .view:selected, GtkPlacesSidebar.sidebar GtkCalendar:selected {
+.view:selected, GtkCalendar:selected, .label:selected, .label:selected:focus, .label:selected:hover, 
.grid-child:selected, .entry:selected, .entry:selected:focus, .menuitem.button.flat:selected, 
.menuitem.sidebar-button.button:selected, .header-bar .menuitem.titlebutton.button:selected,
+.titlebar .menuitem.titlebutton.button:selected, .list-row:selected, .sidebar:selected {
   background-color: #215d9c;
   color: #ffffff; }
-  .view:backdrop:selected, GtkCalendar:backdrop:selected, .label:backdrop:selected, 
.grid-child:backdrop:selected, .entry:backdrop:selected, .menuitem.button.flat:backdrop:selected, .header-bar 
.menuitem.titlebutton.button:backdrop:selected,
-  .titlebar .menuitem.titlebutton.button:backdrop:selected, .list-row:backdrop:selected, 
.sidebar:backdrop:selected, GtkPlacesSidebar.sidebar .view:backdrop:selected, GtkPlacesSidebar.sidebar 
GtkCalendar:backdrop:selected {
+  .view:backdrop:selected, GtkCalendar:backdrop:selected, .label:backdrop:selected, 
.grid-child:backdrop:selected, .entry:backdrop:selected, .menuitem.button.flat:backdrop:selected, 
.menuitem.sidebar-button.button:backdrop:selected, .header-bar .menuitem.titlebutton.button:backdrop:selected,
+  .titlebar .menuitem.titlebutton.button:backdrop:selected, .list-row:backdrop:selected, 
.sidebar:backdrop:selected {
     color: #ffffff; }
 
 /* Decouple the font of context menus from their entry/textview */
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index 8074dc9..4c8fba1 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -77,16 +77,16 @@
   border: 1px solid #4a90d9;
   background-color: rgba(74, 144, 217, 0.2); }
 
-.label.separator, GtkPlacesSidebar.sidebar .view .label.separator {
+.label.separator {
   color: #2e3436; }
-  .label.separator:backdrop, GtkPlacesSidebar.sidebar .view .label.separator:backdrop {
+  .label.separator:backdrop {
     color: #8d9091; }
 .label:insensitive {
   color: #8d9091; }
   .label:insensitive:backdrop {
     color: #c7c7c7; }
 
-.dim-label, .label.separator, GtkPlacesSidebar.sidebar .view .label.separator, .titlebar .subtitle,
+.dim-label, .label.separator, .titlebar .subtitle,
 .header-bar .subtitle {
   opacity: 0.55;
   text-shadow: none; }
@@ -336,7 +336,7 @@ GtkTextView {
   text-shadow: 0 1px rgba(255, 255, 255, 0.76923);
   icon-shadow: 0 1px rgba(255, 255, 255, 0.76923);
   box-shadow: inset 0 1px white, 0 1px white; }
-  .button.flat, .header-bar .titlebutton.button,
+  .button.flat, .sidebar-button.button, .header-bar .titlebutton.button,
   .titlebar .titlebutton.button {
     border-color: transparent;
     background-color: transparent;
@@ -345,11 +345,11 @@ GtkTextView {
     text-shadow: none;
     icon-shadow: none;
     transition: none; }
-    .button.flat:hover, .header-bar .titlebutton.button:hover,
+    .button.flat:hover, .sidebar-button.button:hover, .header-bar .titlebutton.button:hover,
     .titlebar .titlebutton.button:hover {
       transition: all 200ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
       transition-duration: 500ms; }
-      .button.flat:hover:active, .header-bar .titlebutton.button:hover:active,
+      .button.flat:hover:active, .sidebar-button.button:hover:active, .header-bar 
.titlebutton.button:hover:active,
       .titlebar .titlebutton.button:hover:active {
         transition: all 200ms cubic-bezier(0.25, 0.46, 0.45, 0.94); }
   .button:hover, .header-bar .button.titlebutton:hover,
@@ -374,7 +374,7 @@ GtkTextView {
     box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6), 0 1px white;
     transition-duration: 50ms; }
   .button:backdrop, .header-bar .button.titlebutton:backdrop,
-  .titlebar .button.titlebutton:backdrop, .button.flat:backdrop, .header-bar .titlebutton.button:backdrop,
+  .titlebar .button.titlebutton:backdrop, .button.flat:backdrop, .sidebar-button.button:backdrop, 
.header-bar .titlebutton.button:backdrop,
   .titlebar .titlebutton.button:backdrop {
     color: #8d9091;
     border-color: #a8a8a8;
@@ -383,14 +383,14 @@ GtkTextView {
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0);
     -gtk-image-effect: none; }
-    .button:backdrop:active, .button:backdrop:checked, .button.flat:backdrop:active, .header-bar 
.titlebutton.button:backdrop:active,
-    .titlebar .titlebutton.button:backdrop:active, .button.flat:backdrop:checked, .header-bar 
.titlebutton.button:backdrop:checked,
+    .button:backdrop:active, .button:backdrop:checked, .button.flat:backdrop:active, 
.sidebar-button.button:backdrop:active, .header-bar .titlebutton.button:backdrop:active,
+    .titlebar .titlebutton.button:backdrop:active, .button.flat:backdrop:checked, 
.sidebar-button.button:backdrop:checked, .header-bar .titlebutton.button:backdrop:checked,
     .titlebar .titlebutton.button:backdrop:checked {
       color: #8d9091;
       border-color: #a8a8a8;
       background-image: linear-gradient(to bottom, #d4d4d4);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-    .button:backdrop:insensitive, .button.flat:backdrop:insensitive, .header-bar 
.titlebutton.button:backdrop:insensitive,
+    .button:backdrop:insensitive, .button.flat:backdrop:insensitive, 
.sidebar-button.button:backdrop:insensitive, .header-bar .titlebutton.button:backdrop:insensitive,
     .titlebar .titlebutton.button:backdrop:insensitive {
       color: #c7c7c7;
       border-color: #a8a8a8;
@@ -399,11 +399,11 @@ GtkTextView {
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
       .button:backdrop:insensitive > .label, .header-bar .button.titlebutton:backdrop:insensitive > .label,
-      .titlebar .button.titlebutton:backdrop:insensitive > .label, .button.flat:backdrop:insensitive > 
.label, .header-bar .titlebutton.button:backdrop:insensitive > .label,
+      .titlebar .button.titlebutton:backdrop:insensitive > .label, .button.flat:backdrop:insensitive > 
.label, .sidebar-button.button:backdrop:insensitive > .label, .header-bar 
.titlebutton.button:backdrop:insensitive > .label,
       .titlebar .titlebutton.button:backdrop:insensitive > .label {
         color: inherit; }
-    .button:backdrop:insensitive:active, .button:backdrop:insensitive:checked, 
.button.flat:backdrop:insensitive:active, .header-bar .titlebutton.button:backdrop:insensitive:active,
-    .titlebar .titlebutton.button:backdrop:insensitive:active, .button.flat:backdrop:insensitive:checked, 
.header-bar .titlebutton.button:backdrop:insensitive:checked,
+    .button:backdrop:insensitive:active, .button:backdrop:insensitive:checked, 
.button.flat:backdrop:insensitive:active, .sidebar-button.button:backdrop:insensitive:active, .header-bar 
.titlebutton.button:backdrop:insensitive:active,
+    .titlebar .titlebutton.button:backdrop:insensitive:active, .button.flat:backdrop:insensitive:checked, 
.sidebar-button.button:backdrop:insensitive:checked, .header-bar 
.titlebutton.button:backdrop:insensitive:checked,
     .titlebar .titlebutton.button:backdrop:insensitive:checked {
       color: #c7c7c7;
       border-color: #a8a8a8;
@@ -411,13 +411,13 @@ GtkTextView {
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
       .button:backdrop:insensitive:active > .label, .header-bar 
.button.titlebutton:backdrop:insensitive:active > .label,
       .titlebar .button.titlebutton:backdrop:insensitive:active > .label, 
.button:backdrop:insensitive:checked > .label, .header-bar .button.titlebutton:backdrop:insensitive:checked > 
.label,
-      .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, 
.button.flat:backdrop:insensitive:active > .label, .header-bar 
.titlebutton.button:backdrop:insensitive:active > .label,
-      .titlebar .titlebutton.button:backdrop:insensitive:active > .label, 
.button.flat:backdrop:insensitive:checked > .label, .header-bar 
.titlebutton.button:backdrop:insensitive:checked > .label,
+      .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, 
.button.flat:backdrop:insensitive:active > .label, .sidebar-button.button:backdrop:insensitive:active > 
.label, .header-bar .titlebutton.button:backdrop:insensitive:active > .label,
+      .titlebar .titlebutton.button:backdrop:insensitive:active > .label, 
.button.flat:backdrop:insensitive:checked > .label, .sidebar-button.button:backdrop:insensitive:checked > 
.label, .header-bar .titlebutton.button:backdrop:insensitive:checked > .label,
       .titlebar .titlebutton.button:backdrop:insensitive:checked > .label {
         color: inherit; }
-  .button.flat:backdrop, .header-bar .titlebutton.button:backdrop,
-  .titlebar .titlebutton.button:backdrop, .button.flat:insensitive, .header-bar 
.titlebutton.button:insensitive,
-  .titlebar .titlebutton.button:insensitive, .button.flat:backdrop:insensitive, .header-bar 
.titlebutton.button:backdrop:insensitive,
+  .button.flat:backdrop, .sidebar-button.button:backdrop, .header-bar .titlebutton.button:backdrop,
+  .titlebar .titlebutton.button:backdrop, .button.flat:insensitive, .sidebar-button.button:insensitive, 
.header-bar .titlebutton.button:insensitive,
+  .titlebar .titlebutton.button:insensitive, .button.flat:backdrop:insensitive, 
.sidebar-button.button:backdrop:insensitive, .header-bar .titlebutton.button:backdrop:insensitive,
   .titlebar .titlebutton.button:backdrop:insensitive {
     border-color: transparent;
     background-color: transparent;
@@ -564,7 +564,7 @@ GtkTextView {
       box-shadow: none;
       text-shadow: none;
       icon-shadow: none; }
-    .osd .button.flat, .osd .header-bar .titlebutton.button, .header-bar .osd .titlebutton.button,
+    .osd .button.flat, .osd .sidebar-button.button, .osd .header-bar .titlebutton.button, .header-bar .osd 
.titlebutton.button,
     .osd .titlebar .titlebutton.button,
     .titlebar .osd .titlebutton.button {
       border-color: transparent;
@@ -576,7 +576,7 @@ GtkTextView {
       box-shadow: none;
       text-shadow: 0 1px black;
       icon-shadow: 0 1px black; }
-      .osd .button.flat:hover, .osd .header-bar .titlebutton.button:hover, .header-bar .osd 
.titlebutton.button:hover,
+      .osd .button.flat:hover, .osd .sidebar-button.button:hover, .osd .header-bar 
.titlebutton.button:hover, .header-bar .osd .titlebutton.button:hover,
       .osd .titlebar .titlebutton.button:hover,
       .titlebar .osd .titlebutton.button:hover {
         color: white;
@@ -590,7 +590,7 @@ GtkTextView {
         background-clip: padding-box;
         border-color: transparent;
         box-shadow: none; }
-      .osd .button.flat:insensitive, .osd .header-bar .titlebutton.button:insensitive, .header-bar .osd 
.titlebutton.button:insensitive,
+      .osd .button.flat:insensitive, .osd .sidebar-button.button:insensitive, .osd .header-bar 
.titlebutton.button:insensitive, .header-bar .osd .titlebutton.button:insensitive,
       .osd .titlebar .titlebutton.button:insensitive,
       .titlebar .osd .titlebutton.button:insensitive {
         color: #878989;
@@ -603,7 +603,7 @@ GtkTextView {
         background-image: none;
         border-color: transparent;
         box-shadow: none; }
-      .osd .button.flat:backdrop, .osd .header-bar .titlebutton.button:backdrop, .header-bar .osd 
.titlebutton.button:backdrop,
+      .osd .button.flat:backdrop, .osd .sidebar-button.button:backdrop, .osd .header-bar 
.titlebutton.button:backdrop, .header-bar .osd .titlebutton.button:backdrop,
       .osd .titlebar .titlebutton.button:backdrop,
       .titlebar .osd .titlebutton.button:backdrop {
         border-color: transparent;
@@ -612,9 +612,9 @@ GtkTextView {
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0);
         text-shadow: none;
         icon-shadow: none; }
-      .osd .button.flat:active, .osd .header-bar .titlebutton.button:active, .header-bar .osd 
.titlebutton.button:active,
+      .osd .button.flat:active, .osd .sidebar-button.button:active, .osd .header-bar 
.titlebutton.button:active, .header-bar .osd .titlebutton.button:active,
       .osd .titlebar .titlebutton.button:active,
-      .titlebar .osd .titlebutton.button:active, .osd .button.flat:checked, .osd .header-bar 
.titlebutton.button:checked, .header-bar .osd .titlebutton.button:checked,
+      .titlebar .osd .titlebutton.button:active, .osd .button.flat:checked, .osd 
.sidebar-button.button:checked, .osd .header-bar .titlebutton.button:checked, .header-bar .osd 
.titlebutton.button:checked,
       .osd .titlebar .titlebutton.button:checked,
       .titlebar .osd .titlebutton.button:checked {
         color: white;
@@ -637,7 +637,7 @@ GtkTextView {
     text-shadow: 0 -1px rgba(0, 0, 0, 0.54353);
     icon-shadow: 0 -1px rgba(0, 0, 0, 0.54353);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.5), 0 1px white; }
-    .button.suggested-action.flat, .header-bar .suggested-action.titlebutton.button,
+    .button.suggested-action.flat, .suggested-action.sidebar-button.button, .header-bar 
.suggested-action.titlebutton.button,
     .titlebar .suggested-action.titlebutton.button {
       border-color: transparent;
       background-color: transparent;
@@ -662,7 +662,7 @@ GtkTextView {
       text-shadow: 0 -1px rgba(0, 0, 0, 0.62353);
       icon-shadow: 0 -1px rgba(0, 0, 0, 0.62353);
       box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6), 0 1px white; }
-    .button.suggested-action:backdrop, .button.suggested-action.flat:backdrop, .header-bar 
.suggested-action.titlebutton.button:backdrop,
+    .button.suggested-action:backdrop, .button.suggested-action.flat:backdrop, 
.suggested-action.sidebar-button.button:backdrop, .header-bar .suggested-action.titlebutton.button:backdrop,
     .titlebar .suggested-action.titlebutton.button:backdrop {
       color: #dae8f7;
       border-color: #4a90d9;
@@ -670,14 +670,14 @@ GtkTextView {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-      .button.suggested-action:backdrop:active, .button.suggested-action:backdrop:checked, 
.button.suggested-action.flat:backdrop:active, .header-bar 
.suggested-action.titlebutton.button:backdrop:active,
-      .titlebar .suggested-action.titlebutton.button:backdrop:active, 
.button.suggested-action.flat:backdrop:checked, .header-bar 
.suggested-action.titlebutton.button:backdrop:checked,
+      .button.suggested-action:backdrop:active, .button.suggested-action:backdrop:checked, 
.button.suggested-action.flat:backdrop:active, .suggested-action.sidebar-button.button:backdrop:active, 
.header-bar .suggested-action.titlebutton.button:backdrop:active,
+      .titlebar .suggested-action.titlebutton.button:backdrop:active, 
.button.suggested-action.flat:backdrop:checked, .suggested-action.sidebar-button.button:backdrop:checked, 
.header-bar .suggested-action.titlebutton.button:backdrop:checked,
       .titlebar .suggested-action.titlebutton.button:backdrop:checked {
         color: #d4e3f3;
         border-color: #2a76c6;
         background-image: linear-gradient(to bottom, #2a76c6);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-      .button.suggested-action:backdrop:insensitive, .button.suggested-action.flat:backdrop:insensitive, 
.header-bar .suggested-action.titlebutton.button:backdrop:insensitive,
+      .button.suggested-action:backdrop:insensitive, .button.suggested-action.flat:backdrop:insensitive, 
.suggested-action.sidebar-button.button:backdrop:insensitive, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive,
       .titlebar .suggested-action.titlebutton.button:backdrop:insensitive {
         color: #c7c7c7;
         border-color: #a8a8a8;
@@ -686,11 +686,11 @@ GtkTextView {
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
         .button.suggested-action:backdrop:insensitive > .label, .header-bar 
.suggested-action.button.titlebutton:backdrop:insensitive > .label,
-        .titlebar .suggested-action.button.titlebutton:backdrop:insensitive > .label, 
.button.suggested-action.flat:backdrop:insensitive > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive > .label,
+        .titlebar .suggested-action.button.titlebutton:backdrop:insensitive > .label, 
.button.suggested-action.flat:backdrop:insensitive > .label, 
.suggested-action.sidebar-button.button:backdrop:insensitive > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive > .label,
         .titlebar .suggested-action.titlebutton.button:backdrop:insensitive > .label {
           color: inherit; }
-        .button.suggested-action:backdrop:insensitive:active, 
.button.suggested-action:backdrop:insensitive:checked, 
.button.suggested-action.flat:backdrop:insensitive:active, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:active,
-        .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:active, 
.button.suggested-action.flat:backdrop:insensitive:checked, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:checked,
+        .button.suggested-action:backdrop:insensitive:active, 
.button.suggested-action:backdrop:insensitive:checked, 
.button.suggested-action.flat:backdrop:insensitive:active, 
.suggested-action.sidebar-button.button:backdrop:insensitive:active, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:active,
+        .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:active, 
.button.suggested-action.flat:backdrop:insensitive:checked, 
.suggested-action.sidebar-button.button:backdrop:insensitive:checked, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:checked,
         .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:checked {
           color: #8db8e6;
           border-color: #5093da;
@@ -698,13 +698,13 @@ GtkTextView {
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
           .button.suggested-action:backdrop:insensitive:active > .label, .header-bar 
.suggested-action.button.titlebutton:backdrop:insensitive:active > .label,
           .titlebar .suggested-action.button.titlebutton:backdrop:insensitive:active > .label, 
.button.suggested-action:backdrop:insensitive:checked > .label, .header-bar 
.suggested-action.button.titlebutton:backdrop:insensitive:checked > .label,
-          .titlebar .suggested-action.button.titlebutton:backdrop:insensitive:checked > .label, 
.button.suggested-action.flat:backdrop:insensitive:active > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:active > .label,
-          .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:active > .label, 
.button.suggested-action.flat:backdrop:insensitive:checked > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:checked > .label,
+          .titlebar .suggested-action.button.titlebutton:backdrop:insensitive:checked > .label, 
.button.suggested-action.flat:backdrop:insensitive:active > .label, 
.suggested-action.sidebar-button.button:backdrop:insensitive:active > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:active > .label,
+          .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:active > .label, 
.button.suggested-action.flat:backdrop:insensitive:checked > .label, 
.suggested-action.sidebar-button.button:backdrop:insensitive:checked > .label, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive:checked > .label,
           .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
-    .button.suggested-action.flat:backdrop, .header-bar .suggested-action.titlebutton.button:backdrop,
-    .titlebar .suggested-action.titlebutton.button:backdrop, .button.suggested-action.flat:insensitive, 
.header-bar .suggested-action.titlebutton.button:insensitive,
-    .titlebar .suggested-action.titlebutton.button:insensitive, 
.button.suggested-action.flat:backdrop:insensitive, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive,
+    .button.suggested-action.flat:backdrop, .suggested-action.sidebar-button.button:backdrop, .header-bar 
.suggested-action.titlebutton.button:backdrop,
+    .titlebar .suggested-action.titlebutton.button:backdrop, .button.suggested-action.flat:insensitive, 
.suggested-action.sidebar-button.button:insensitive, .header-bar 
.suggested-action.titlebutton.button:insensitive,
+    .titlebar .suggested-action.titlebutton.button:insensitive, 
.button.suggested-action.flat:backdrop:insensitive, 
.suggested-action.sidebar-button.button:backdrop:insensitive, .header-bar 
.suggested-action.titlebutton.button:backdrop:insensitive,
     .titlebar .suggested-action.titlebutton.button:backdrop:insensitive {
       border-color: transparent;
       background-color: transparent;
@@ -784,7 +784,7 @@ GtkTextView {
     text-shadow: 0 -1px rgba(0, 0, 0, 0.56078);
     icon-shadow: 0 -1px rgba(0, 0, 0, 0.56078);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.5), 0 1px white; }
-    .button.destructive-action.flat, .header-bar .destructive-action.titlebutton.button,
+    .button.destructive-action.flat, .destructive-action.sidebar-button.button, .header-bar 
.destructive-action.titlebutton.button,
     .titlebar .destructive-action.titlebutton.button {
       border-color: transparent;
       background-color: transparent;
@@ -809,7 +809,7 @@ GtkTextView {
       text-shadow: 0 -1px rgba(0, 0, 0, 0.64078);
       icon-shadow: 0 -1px rgba(0, 0, 0, 0.64078);
       box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6), 0 1px white; }
-    .button.destructive-action:backdrop, .button.destructive-action.flat:backdrop, .header-bar 
.destructive-action.titlebutton.button:backdrop,
+    .button.destructive-action:backdrop, .button.destructive-action.flat:backdrop, 
.destructive-action.sidebar-button.button:backdrop, .header-bar 
.destructive-action.titlebutton.button:backdrop,
     .titlebar .destructive-action.titlebutton.button:backdrop {
       color: #fbd4d4;
       border-color: #ef2929;
@@ -817,14 +817,14 @@ GtkTextView {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-      .button.destructive-action:backdrop:active, .button.destructive-action:backdrop:checked, 
.button.destructive-action.flat:backdrop:active, .header-bar 
.destructive-action.titlebutton.button:backdrop:active,
-      .titlebar .destructive-action.titlebutton.button:backdrop:active, 
.button.destructive-action.flat:backdrop:checked, .header-bar 
.destructive-action.titlebutton.button:backdrop:checked,
+      .button.destructive-action:backdrop:active, .button.destructive-action:backdrop:checked, 
.button.destructive-action.flat:backdrop:active, .destructive-action.sidebar-button.button:backdrop:active, 
.header-bar .destructive-action.titlebutton.button:backdrop:active,
+      .titlebar .destructive-action.titlebutton.button:backdrop:active, 
.button.destructive-action.flat:backdrop:checked, .destructive-action.sidebar-button.button:backdrop:checked, 
.header-bar .destructive-action.titlebutton.button:backdrop:checked,
       .titlebar .destructive-action.titlebutton.button:backdrop:checked {
         color: #f6cfcf;
         border-color: #d51010;
         background-image: linear-gradient(to bottom, #d51010);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-      .button.destructive-action:backdrop:insensitive, .button.destructive-action.flat:backdrop:insensitive, 
.header-bar .destructive-action.titlebutton.button:backdrop:insensitive,
+      .button.destructive-action:backdrop:insensitive, .button.destructive-action.flat:backdrop:insensitive, 
.destructive-action.sidebar-button.button:backdrop:insensitive, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive,
       .titlebar .destructive-action.titlebutton.button:backdrop:insensitive {
         color: #c7c7c7;
         border-color: #a8a8a8;
@@ -833,11 +833,11 @@ GtkTextView {
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
         .button.destructive-action:backdrop:insensitive > .label, .header-bar 
.destructive-action.button.titlebutton:backdrop:insensitive > .label,
-        .titlebar .destructive-action.button.titlebutton:backdrop:insensitive > .label, 
.button.destructive-action.flat:backdrop:insensitive > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive > .label,
+        .titlebar .destructive-action.button.titlebutton:backdrop:insensitive > .label, 
.button.destructive-action.flat:backdrop:insensitive > .label, 
.destructive-action.sidebar-button.button:backdrop:insensitive > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive > .label,
         .titlebar .destructive-action.titlebutton.button:backdrop:insensitive > .label {
           color: inherit; }
-        .button.destructive-action:backdrop:insensitive:active, 
.button.destructive-action:backdrop:insensitive:checked, 
.button.destructive-action.flat:backdrop:insensitive:active, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:active,
-        .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:active, 
.button.destructive-action.flat:backdrop:insensitive:checked, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:checked,
+        .button.destructive-action:backdrop:insensitive:active, 
.button.destructive-action:backdrop:insensitive:checked, 
.button.destructive-action.flat:backdrop:insensitive:active, 
.destructive-action.sidebar-button.button:backdrop:insensitive:active, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:active,
+        .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:active, 
.button.destructive-action.flat:backdrop:insensitive:checked, 
.destructive-action.sidebar-button.button:backdrop:insensitive:checked, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:checked,
         .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:checked {
           color: #f47979;
           border-color: #ef3131;
@@ -845,13 +845,13 @@ GtkTextView {
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
           .button.destructive-action:backdrop:insensitive:active > .label, .header-bar 
.destructive-action.button.titlebutton:backdrop:insensitive:active > .label,
           .titlebar .destructive-action.button.titlebutton:backdrop:insensitive:active > .label, 
.button.destructive-action:backdrop:insensitive:checked > .label, .header-bar 
.destructive-action.button.titlebutton:backdrop:insensitive:checked > .label,
-          .titlebar .destructive-action.button.titlebutton:backdrop:insensitive:checked > .label, 
.button.destructive-action.flat:backdrop:insensitive:active > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:active > .label,
-          .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:active > .label, 
.button.destructive-action.flat:backdrop:insensitive:checked > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:checked > .label,
+          .titlebar .destructive-action.button.titlebutton:backdrop:insensitive:checked > .label, 
.button.destructive-action.flat:backdrop:insensitive:active > .label, 
.destructive-action.sidebar-button.button:backdrop:insensitive:active > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:active > .label,
+          .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:active > .label, 
.button.destructive-action.flat:backdrop:insensitive:checked > .label, 
.destructive-action.sidebar-button.button:backdrop:insensitive:checked > .label, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive:checked > .label,
           .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
-    .button.destructive-action.flat:backdrop, .header-bar .destructive-action.titlebutton.button:backdrop,
-    .titlebar .destructive-action.titlebutton.button:backdrop, .button.destructive-action.flat:insensitive, 
.header-bar .destructive-action.titlebutton.button:insensitive,
-    .titlebar .destructive-action.titlebutton.button:insensitive, 
.button.destructive-action.flat:backdrop:insensitive, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive,
+    .button.destructive-action.flat:backdrop, .destructive-action.sidebar-button.button:backdrop, 
.header-bar .destructive-action.titlebutton.button:backdrop,
+    .titlebar .destructive-action.titlebutton.button:backdrop, .button.destructive-action.flat:insensitive, 
.destructive-action.sidebar-button.button:insensitive, .header-bar 
.destructive-action.titlebutton.button:insensitive,
+    .titlebar .destructive-action.titlebutton.button:insensitive, 
.button.destructive-action.flat:backdrop:insensitive, 
.destructive-action.sidebar-button.button:backdrop:insensitive, .header-bar 
.destructive-action.titlebutton.button:backdrop:insensitive,
     .titlebar .destructive-action.titlebutton.button:backdrop:insensitive {
       border-color: transparent;
       background-color: transparent;
@@ -1063,13 +1063,17 @@ GtkTextView {
     .inline-toolbar GtkToolButton > .button:backdrop:insensitive:active > .label, .inline-toolbar 
GtkToolButton > .button:backdrop:insensitive:checked > .label {
       color: inherit; }
 
-.inline-toolbar.toolbar GtkToolButton > .button.flat, .inline-toolbar GtkToolButton > .button.flat, 
.inline-toolbar.search-bar GtkToolButton > .button.flat, .inline-toolbar.location-bar GtkToolButton > 
.button.flat, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton > .button.titlebutton,
+.inline-toolbar.toolbar GtkToolButton > .button.flat, .inline-toolbar GtkToolButton > .button.flat, 
.inline-toolbar.search-bar GtkToolButton > .button.flat, .inline-toolbar.location-bar GtkToolButton > 
.button.flat, .inline-toolbar.toolbar GtkToolButton > .sidebar-button.button, .inline-toolbar GtkToolButton > 
.sidebar-button.button, .inline-toolbar.search-bar GtkToolButton > .sidebar-button.button, 
.inline-toolbar.location-bar GtkToolButton > .sidebar-button.button, .inline-toolbar .header-bar 
GtkToolButton > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop > .button.flat,
 .inline-toolbar GtkToolButton:backdrop > .button.flat,
 .inline-toolbar.search-bar GtkToolButton:backdrop > .button.flat,
 .inline-toolbar.location-bar GtkToolButton:backdrop > .button.flat,
+.inline-toolbar.toolbar GtkToolButton:backdrop > .sidebar-button.button,
+.inline-toolbar GtkToolButton:backdrop > .sidebar-button.button,
+.inline-toolbar.search-bar GtkToolButton:backdrop > .sidebar-button.button,
+.inline-toolbar.location-bar GtkToolButton:backdrop > .sidebar-button.button,
 .inline-toolbar .header-bar GtkToolButton:backdrop > .button.titlebutton,
 .header-bar .inline-toolbar GtkToolButton:backdrop > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:backdrop > .button.titlebutton,
@@ -1081,16 +1085,21 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
 .titlebar GtkComboBox.combobox-entry .button.titlebutton, GtkComboBox.combobox-entry .button:backdrop, 
.linked > GtkComboBox > .button:dir(ltr) {
   border-radius: 0;
   border-left-style: none; }
-  .inline-toolbar GtkToolButton > .button.flat:dir(rtl), .inline-toolbar .header-bar GtkToolButton > 
.button.titlebutton:dir(rtl), .header-bar .inline-toolbar GtkToolButton > .button.titlebutton:dir(rtl),
+  .inline-toolbar GtkToolButton > .button.flat:dir(rtl), .inline-toolbar GtkToolButton > 
.sidebar-button.button:dir(rtl), .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:dir(rtl), 
.header-bar .inline-toolbar GtkToolButton > .button.titlebutton:dir(rtl),
   .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:dir(rtl),
   .titlebar .inline-toolbar GtkToolButton > .button.titlebutton:dir(rtl),
-  .inline-toolbar GtkToolButton:backdrop > .button.flat:dir(rtl), .inline-toolbar.toolbar 
GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar GtkToolButton:dir(rtl) > .button.flat, 
.inline-toolbar.search-bar GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar.location-bar 
GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar .header-bar GtkToolButton:dir(rtl) > 
.button.titlebutton, .header-bar .inline-toolbar GtkToolButton:dir(rtl) > .button.titlebutton,
+  .inline-toolbar GtkToolButton:backdrop > .button.flat:dir(rtl),
+  .inline-toolbar GtkToolButton:backdrop > .sidebar-button.button:dir(rtl), .inline-toolbar.toolbar 
GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar GtkToolButton:dir(rtl) > .button.flat, 
.inline-toolbar.search-bar GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar.location-bar 
GtkToolButton:dir(rtl) > .button.flat, .inline-toolbar.toolbar GtkToolButton:dir(rtl) > 
.sidebar-button.button, .inline-toolbar GtkToolButton:dir(rtl) > .sidebar-button.button, 
.inline-toolbar.search-bar GtkToolButton:dir(rtl) > .sidebar-button.button, .inline-toolbar.location-bar 
GtkToolButton:dir(rtl) > .sidebar-button.button, .inline-toolbar .header-bar GtkToolButton:dir(rtl) > 
.button.titlebutton, .header-bar .inline-toolbar GtkToolButton:dir(rtl) > .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:dir(rtl) > .button.titlebutton,
   .titlebar .inline-toolbar GtkToolButton:dir(rtl) > .button.titlebutton,
   .inline-toolbar.toolbar GtkToolButton:backdrop:dir(rtl) > .button.flat,
   .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .button.flat,
   .inline-toolbar.search-bar GtkToolButton:backdrop:dir(rtl) > .button.flat,
   .inline-toolbar.location-bar GtkToolButton:backdrop:dir(rtl) > .button.flat,
+  .inline-toolbar.toolbar GtkToolButton:backdrop:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar.search-bar GtkToolButton:backdrop:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar.location-bar GtkToolButton:backdrop:dir(rtl) > .sidebar-button.button,
   .inline-toolbar .header-bar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
   .header-bar .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
@@ -1101,13 +1110,17 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
     border-left-style: solid; }
 
 .osd .button:first-child:hover, .osd .button:first-child:active, .osd .button:first-child:checked, .osd 
.button:first-child:insensitive, .osd .button:first-child:backdrop, .osd 
.button.suggested-action:first-child, .osd .button.destructive-action:first-child, .inline-toolbar 
.button:first-child, .linked > .button:first-child, .header-bar .linked > .button.titlebutton:first-child,
-.titlebar .linked > .button.titlebutton:first-child, .inline-toolbar.toolbar GtkToolButton:first-child > 
.button.flat, .inline-toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:first-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:first-child > 
.button.flat, .inline-toolbar .header-bar GtkToolButton:first-child > .button.titlebutton, .header-bar 
.inline-toolbar GtkToolButton:first-child > .button.titlebutton,
+.titlebar .linked > .button.titlebutton:first-child, .inline-toolbar.toolbar GtkToolButton:first-child > 
.button.flat, .inline-toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:first-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:first-child > 
.button.flat, .inline-toolbar.toolbar GtkToolButton:first-child > .sidebar-button.button, .inline-toolbar 
GtkToolButton:first-child > .sidebar-button.button, .inline-toolbar.search-bar GtkToolButton:first-child > 
.sidebar-button.button, .inline-toolbar.location-bar GtkToolButton:first-child > .sidebar-button.button, 
.inline-toolbar .header-bar GtkToolButton:first-child > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton:first-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:first-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:first-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:first-child > .button.flat,
 .inline-toolbar GtkToolButton:backdrop:first-child > .button.flat,
 .inline-toolbar.search-bar GtkToolButton:backdrop:first-child > .button.flat,
 .inline-toolbar.location-bar GtkToolButton:backdrop:first-child > .button.flat,
+.inline-toolbar.toolbar GtkToolButton:backdrop:first-child > .sidebar-button.button,
+.inline-toolbar GtkToolButton:backdrop:first-child > .sidebar-button.button,
+.inline-toolbar.search-bar GtkToolButton:backdrop:first-child > .sidebar-button.button,
+.inline-toolbar.location-bar GtkToolButton:backdrop:first-child > .sidebar-button.button,
 .inline-toolbar .header-bar GtkToolButton:backdrop:first-child > .button.titlebutton,
 .header-bar .inline-toolbar GtkToolButton:backdrop:first-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:backdrop:first-child > .button.titlebutton,
@@ -1115,42 +1128,55 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   border-radius: 3px 0 0 3px;
   border-left-style: solid; }
 .osd .button:last-child:hover, .osd .button:last-child:active, .osd .button:last-child:checked, .osd 
.button:last-child:insensitive, .osd .button:last-child:backdrop, .osd .button.suggested-action:last-child, 
.osd .button.destructive-action:last-child, .inline-toolbar .button:last-child, .linked > .button:last-child, 
.header-bar .linked > .button.titlebutton:last-child,
-.titlebar .linked > .button.titlebutton:last-child, .inline-toolbar.toolbar GtkToolButton:last-child > 
.button.flat, .inline-toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:last-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:last-child > 
.button.flat, .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton, .header-bar 
.inline-toolbar GtkToolButton:last-child > .button.titlebutton,
+.titlebar .linked > .button.titlebutton:last-child, .inline-toolbar.toolbar GtkToolButton:last-child > 
.button.flat, .inline-toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:last-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:last-child > 
.button.flat, .inline-toolbar.toolbar GtkToolButton:last-child > .sidebar-button.button, .inline-toolbar 
GtkToolButton:last-child > .sidebar-button.button, .inline-toolbar.search-bar GtkToolButton:last-child > 
.sidebar-button.button, .inline-toolbar.location-bar GtkToolButton:last-child > .sidebar-button.button, 
.inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton:last-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:last-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:last-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:last-child > .button.flat,
 .inline-toolbar GtkToolButton:backdrop:last-child > .button.flat,
 .inline-toolbar.search-bar GtkToolButton:backdrop:last-child > .button.flat,
 .inline-toolbar.location-bar GtkToolButton:backdrop:last-child > .button.flat,
+.inline-toolbar.toolbar GtkToolButton:backdrop:last-child > .sidebar-button.button,
+.inline-toolbar GtkToolButton:backdrop:last-child > .sidebar-button.button,
+.inline-toolbar.search-bar GtkToolButton:backdrop:last-child > .sidebar-button.button,
+.inline-toolbar.location-bar GtkToolButton:backdrop:last-child > .sidebar-button.button,
 .inline-toolbar .header-bar GtkToolButton:backdrop:last-child > .button.titlebutton,
 .header-bar .inline-toolbar GtkToolButton:backdrop:last-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:backdrop:last-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:backdrop:last-child > .button.titlebutton, 
GtkComboBox.combobox-entry .entry:last-child, GtkComboBox.combobox-entry .button:last-child, .linked > 
GtkComboBox:last-child > .button {
   border-radius: 0 3px 3px 0; }
   .osd .button:last-child:dir(rtl):hover, .osd .button:last-child:dir(rtl):active, .osd 
.button:last-child:dir(rtl):checked, .osd .button:last-child:dir(rtl):insensitive, .osd 
.button:last-child:dir(rtl):backdrop, .osd .button.suggested-action:last-child:dir(rtl), .osd 
.button.destructive-action:last-child:dir(rtl), .inline-toolbar .button:last-child:dir(rtl), .linked > 
.button:last-child:dir(rtl), .header-bar .linked > .button.titlebutton:last-child:dir(rtl),
-  .titlebar .linked > .button.titlebutton:last-child:dir(rtl), .inline-toolbar GtkToolButton:last-child > 
.button.flat:dir(rtl), .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton:dir(rtl), 
.header-bar .inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
+  .titlebar .linked > .button.titlebutton:last-child:dir(rtl), .inline-toolbar GtkToolButton:last-child > 
.button.flat:dir(rtl), .inline-toolbar GtkToolButton:last-child > .sidebar-button.button:dir(rtl), 
.inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton:dir(rtl), .header-bar 
.inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
   .inline-toolbar .titlebar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
   .titlebar .inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
-  .inline-toolbar GtkToolButton:backdrop:last-child > .button.flat:dir(rtl), .inline-toolbar.toolbar 
GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar GtkToolButton:last-child:dir(rtl) > 
.button.flat, .inline-toolbar.search-bar GtkToolButton:last-child:dir(rtl) > .button.flat, 
.inline-toolbar.location-bar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar .header-bar 
GtkToolButton:last-child:dir(rtl) > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton:last-child:dir(rtl) > .button.titlebutton,
+  .inline-toolbar GtkToolButton:backdrop:last-child > .button.flat:dir(rtl),
+  .inline-toolbar GtkToolButton:backdrop:last-child > .sidebar-button.button:dir(rtl), 
.inline-toolbar.toolbar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar 
GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar.location-bar 
GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar.toolbar GtkToolButton:last-child:dir(rtl) > 
.sidebar-button.button, .inline-toolbar GtkToolButton:last-child:dir(rtl) > .sidebar-button.button, 
.inline-toolbar.search-bar GtkToolButton:last-child:dir(rtl) > .sidebar-button.button, 
.inline-toolbar.location-bar GtkToolButton:last-child:dir(rtl) > .sidebar-button.button, .inline-toolbar 
.header-bar GtkToolButton:last-child:dir(rtl) > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton:last-child:dir(rtl) > .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:last-child:dir(rtl) > .button.titlebutton,
   .titlebar .inline-toolbar GtkToolButton:last-child:dir(rtl) > .button.titlebutton,
   .inline-toolbar.toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .button.flat,
   .inline-toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .button.flat,
   .inline-toolbar.search-bar GtkToolButton:backdrop:last-child:dir(rtl) > .button.flat,
   .inline-toolbar.location-bar GtkToolButton:backdrop:last-child:dir(rtl) > .button.flat,
+  .inline-toolbar.toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar.search-bar GtkToolButton:backdrop:last-child:dir(rtl) > .sidebar-button.button,
+  .inline-toolbar.location-bar GtkToolButton:backdrop:last-child:dir(rtl) > .sidebar-button.button,
   .inline-toolbar .header-bar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton,
   .header-bar .inline-toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton,
   .titlebar .inline-toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton, 
GtkComboBox.combobox-entry .entry:last-child:dir(rtl), GtkComboBox.combobox-entry 
.button:last-child:dir(rtl), .linked > GtkComboBox:last-child > .button:dir(rtl) {
     border-right-style: solid; }
 .osd .button:only-child:hover, .osd .button:only-child:active, .osd .button:only-child:checked, .osd 
.button:only-child:insensitive, .osd .button:only-child:backdrop, .osd .button.suggested-action:only-child, 
.osd .button.destructive-action:only-child, .inline-toolbar .button:only-child, .linked > .button:only-child, 
.header-bar .linked > .button.titlebutton:only-child,
-.titlebar .linked > .button.titlebutton:only-child, .inline-toolbar.toolbar GtkToolButton:only-child > 
.button.flat, .inline-toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:only-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:only-child > 
.button.flat, .inline-toolbar .header-bar GtkToolButton:only-child > .button.titlebutton, .header-bar 
.inline-toolbar GtkToolButton:only-child > .button.titlebutton,
+.titlebar .linked > .button.titlebutton:only-child, .inline-toolbar.toolbar GtkToolButton:only-child > 
.button.flat, .inline-toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar.search-bar 
GtkToolButton:only-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:only-child > 
.button.flat, .inline-toolbar.toolbar GtkToolButton:only-child > .sidebar-button.button, .inline-toolbar 
GtkToolButton:only-child > .sidebar-button.button, .inline-toolbar.search-bar GtkToolButton:only-child > 
.sidebar-button.button, .inline-toolbar.location-bar GtkToolButton:only-child > .sidebar-button.button, 
.inline-toolbar .header-bar GtkToolButton:only-child > .button.titlebutton, .header-bar .inline-toolbar 
GtkToolButton:only-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:only-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:only-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:only-child > .button.flat,
 .inline-toolbar GtkToolButton:backdrop:only-child > .button.flat,
 .inline-toolbar.search-bar GtkToolButton:backdrop:only-child > .button.flat,
 .inline-toolbar.location-bar GtkToolButton:backdrop:only-child > .button.flat,
+.inline-toolbar.toolbar GtkToolButton:backdrop:only-child > .sidebar-button.button,
+.inline-toolbar GtkToolButton:backdrop:only-child > .sidebar-button.button,
+.inline-toolbar.search-bar GtkToolButton:backdrop:only-child > .sidebar-button.button,
+.inline-toolbar.location-bar GtkToolButton:backdrop:only-child > .sidebar-button.button,
 .inline-toolbar .header-bar GtkToolButton:backdrop:only-child > .button.titlebutton,
 .header-bar .inline-toolbar GtkToolButton:backdrop:only-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:backdrop:only-child > .button.titlebutton,
@@ -1180,8 +1206,9 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   border-radius: 3px;
   border-style: solid; }
 
-.menuitem.button.flat, .header-bar .menuitem.titlebutton.button,
-.titlebar .menuitem.titlebutton.button, .menuitem.button.flat:backdrop, 
.menuitem.button.flat:backdrop:hover, .header-bar .menuitem.titlebutton.button:backdrop:hover,
+.menuitem.button.flat, .menuitem.sidebar-button.button, .header-bar .menuitem.titlebutton.button,
+.titlebar .menuitem.titlebutton.button, .menuitem.button.flat:backdrop, 
.menuitem.sidebar-button.button:backdrop, .header-bar .menuitem.titlebutton.button:backdrop,
+.titlebar .menuitem.titlebutton.button:backdrop, .menuitem.button.flat:backdrop:hover, 
.menuitem.sidebar-button.button:backdrop:hover, .header-bar .menuitem.titlebutton.button:backdrop:hover,
 .titlebar .menuitem.titlebutton.button:backdrop:hover, .button:link, .header-bar .button.titlebutton:link,
 .titlebar .button.titlebutton:link, .button:visited, .header-bar .button.titlebutton:visited,
 .titlebar .button.titlebutton:visited, .button:link:hover, .button:link:active, .button:link:checked, 
.button:visited:hover, .button:visited:active, .button:visited:checked, .button:link:backdrop, 
.button:visited:backdrop, .menu.button, .header-bar .menu.button.titlebutton,
@@ -1196,24 +1223,42 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
 .list-row.button:backdrop:insensitive:active,
 .list-row.button:backdrop:insensitive:checked,
 .list-row.button:insensitive:active,
-.list-row.button:insensitive:checked, .app-notification .button.flat, .app-notification .header-bar 
.titlebutton.button, .header-bar .app-notification .titlebutton.button,
+.list-row.button:insensitive:checked, .app-notification .button.flat, .app-notification 
.sidebar-button.button, .app-notification .header-bar .titlebutton.button, .header-bar .app-notification 
.titlebutton.button,
 .app-notification .titlebar .titlebutton.button,
 .titlebar .app-notification .titlebutton.button,
-.app-notification.frame .button.flat, .app-notification .button.flat:backdrop, .app-notification 
.button.flat:insensitive, .app-notification .button.flat:backdrop:insensitive, .app-notification .header-bar 
.titlebutton.button:backdrop:insensitive, .header-bar .app-notification 
.titlebutton.button:backdrop:insensitive,
+.app-notification.frame .button.flat,
+.app-notification.frame .sidebar-button.button,
+.app-notification.frame .header-bar .button.titlebutton,
+.header-bar .app-notification.frame .button.titlebutton,
+.app-notification.frame .titlebar .button.titlebutton,
+.titlebar .app-notification.frame .button.titlebutton, .app-notification .button.flat:backdrop, 
.app-notification .sidebar-button.button:backdrop, .app-notification .header-bar 
.titlebutton.button:backdrop, .header-bar .app-notification .titlebutton.button:backdrop,
+.app-notification .titlebar .titlebutton.button:backdrop,
+.titlebar .app-notification .titlebutton.button:backdrop, .app-notification .button.flat:insensitive, 
.app-notification .sidebar-button.button:insensitive, .app-notification .header-bar 
.titlebutton.button:insensitive, .header-bar .app-notification .titlebutton.button:insensitive,
+.app-notification .titlebar .titlebutton.button:insensitive,
+.titlebar .app-notification .titlebutton.button:insensitive, .app-notification 
.button.flat:backdrop:insensitive, .app-notification .sidebar-button.button:backdrop:insensitive, 
.app-notification .header-bar .titlebutton.button:backdrop:insensitive, .header-bar .app-notification 
.titlebutton.button:backdrop:insensitive,
 .app-notification .titlebar .titlebutton.button:backdrop:insensitive,
 .titlebar .app-notification .titlebutton.button:backdrop:insensitive,
 .app-notification.frame .button.flat:backdrop,
+.app-notification.frame .sidebar-button.button:backdrop,
 .app-notification.frame .header-bar .button.titlebutton:backdrop,
 .header-bar .app-notification.frame .button.titlebutton:backdrop,
 .app-notification.frame .titlebar .button.titlebutton:backdrop,
 .titlebar .app-notification.frame .button.titlebutton:backdrop,
 .app-notification.frame .button.flat:insensitive,
+.app-notification.frame .sidebar-button.button:insensitive,
 .app-notification.frame .header-bar .button.titlebutton:insensitive,
 .header-bar .app-notification.frame .button.titlebutton:insensitive,
 .app-notification.frame .titlebar .button.titlebutton:insensitive,
 .titlebar .app-notification.frame .button.titlebutton:insensitive,
-.app-notification.frame .button.flat:backdrop:insensitive, GtkCalendar.button, .header-bar 
GtkCalendar.button.titlebutton,
-.titlebar GtkCalendar.button.titlebutton, GtkCalendar.button:hover, GtkCalendar.button:backdrop, 
.scale-popup .button:hover, .scale-popup .button:backdrop, .scale-popup .button:backdrop:hover, .scale-popup 
.button:backdrop:insensitive {
+.app-notification.frame .button.flat:backdrop:insensitive,
+.app-notification.frame .sidebar-button.button:backdrop:insensitive,
+.app-notification.frame .header-bar .button.titlebutton:backdrop:insensitive,
+.header-bar .app-notification.frame .button.titlebutton:backdrop:insensitive,
+.app-notification.frame .titlebar .button.titlebutton:backdrop:insensitive,
+.titlebar .app-notification.frame .button.titlebutton:backdrop:insensitive, GtkCalendar.button, .header-bar 
GtkCalendar.button.titlebutton,
+.titlebar GtkCalendar.button.titlebutton, GtkCalendar.button:hover, .header-bar 
GtkCalendar.button.titlebutton:hover,
+.titlebar GtkCalendar.button.titlebutton:hover, GtkCalendar.button:backdrop, .header-bar 
GtkCalendar.button.titlebutton:backdrop,
+.titlebar GtkCalendar.button.titlebutton:backdrop, .scale-popup .button:hover, .scale-popup 
.button:backdrop, .scale-popup .button:backdrop:hover, .scale-popup .button:backdrop:insensitive {
   border-color: transparent;
   background-color: transparent;
   background-image: none;
@@ -1222,10 +1267,10 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   icon-shadow: none; }
 
 /* menu buttons */
-.menuitem.button.flat, .header-bar .menuitem.titlebutton.button,
+.menuitem.button.flat, .menuitem.sidebar-button.button, .header-bar .menuitem.titlebutton.button,
 .titlebar .menuitem.titlebutton.button {
   outline-offset: -1px; }
-  .menuitem.button.flat:hover, .header-bar .menuitem.titlebutton.button:hover,
+  .menuitem.button.flat:hover, .menuitem.sidebar-button.button:hover, .header-bar 
.menuitem.titlebutton.button:hover,
   .titlebar .menuitem.titlebutton.button:hover {
     background-color: #d9dada; }
 
@@ -1497,7 +1542,7 @@ GtkComboBox {
     color: #c7c7c7; }
   GtkComboBox .menuitem {
     text-shadow: none; }
-  GtkComboBox .separator.vertical, GtkComboBox GtkPlacesSidebar.sidebar .view .vertical.separator, 
GtkPlacesSidebar.sidebar .view GtkComboBox .vertical.separator {
+  GtkComboBox .separator.vertical {
     -GtkWidget-wide-separators: true; }
 
 /************
@@ -1562,10 +1607,8 @@ GtkComboBox {
     padding-left: 12px;
     padding-right: 12px; }
   .titlebar .header-bar-separator, .titlebar > GtkBox > .separator.vertical,
-  GtkPlacesSidebar.sidebar .view .titlebar > GtkBox > .vertical.separator:backdrop,
   .header-bar .header-bar-separator,
-  .header-bar > GtkBox > .separator.vertical,
-  GtkPlacesSidebar.sidebar .view .header-bar > GtkBox > .vertical.separator:backdrop {
+  .header-bar > GtkBox > .separator.vertical {
     -GtkWidget-wide-separators: true;
     -GtkWidget-separator-width: 1px;
     border-width: 0 1px;
@@ -1594,9 +1637,10 @@ GtkComboBox {
       text-shadow: 0 -1px rgba(0, 0, 0, 0.54353);
       icon-shadow: 0 -1px rgba(0, 0, 0, 0.54353);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.5), 0 1px #a4c7ec; }
-      .titlebar.selection-mode .button.flat,
+      .titlebar.selection-mode .button.flat, .titlebar.selection-mode .sidebar-button.button,
       .titlebar.selection-mode .titlebutton.button,
       .header-bar.selection-mode .button.flat,
+      .header-bar.selection-mode .sidebar-button.button,
       .header-bar.selection-mode .titlebutton.button {
         border-color: transparent;
         background-color: transparent;
@@ -1623,10 +1667,11 @@ GtkComboBox {
         text-shadow: 0 -1px rgba(0, 0, 0, 0.62353);
         icon-shadow: 0 -1px rgba(0, 0, 0, 0.62353);
         box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6), 0 1px #a4c7ec; 
}
-      .titlebar.selection-mode .button:backdrop, .titlebar.selection-mode .button.flat:backdrop,
+      .titlebar.selection-mode .button:backdrop, .titlebar.selection-mode .button.flat:backdrop, 
.titlebar.selection-mode .sidebar-button.button:backdrop,
       .titlebar.selection-mode .titlebutton.button:backdrop,
       .header-bar.selection-mode .button:backdrop,
       .header-bar.selection-mode .button.flat:backdrop,
+      .header-bar.selection-mode .sidebar-button.button:backdrop,
       .header-bar.selection-mode .titlebutton.button:backdrop {
         color: #dae8f7;
         border-color: #4a90d9;
@@ -1636,24 +1681,27 @@ GtkComboBox {
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(164, 199, 236, 0);
         -gtk-image-effect: none;
         border-color: #184472; }
-        .titlebar.selection-mode .button:backdrop:active, .titlebar.selection-mode .button:backdrop:checked, 
.titlebar.selection-mode .button.flat:backdrop:active,
-        .titlebar.selection-mode .titlebutton.button:backdrop:active, .titlebar.selection-mode 
.button.flat:backdrop:checked,
+        .titlebar.selection-mode .button:backdrop:active, .titlebar.selection-mode .button:backdrop:checked, 
.titlebar.selection-mode .button.flat:backdrop:active, .titlebar.selection-mode 
.sidebar-button.button:backdrop:active,
+        .titlebar.selection-mode .titlebutton.button:backdrop:active, .titlebar.selection-mode 
.button.flat:backdrop:checked, .titlebar.selection-mode .sidebar-button.button:backdrop:checked,
         .titlebar.selection-mode .titlebutton.button:backdrop:checked,
         .header-bar.selection-mode .button:backdrop:active,
         .header-bar.selection-mode .button:backdrop:checked,
         .header-bar.selection-mode .button.flat:backdrop:active,
+        .header-bar.selection-mode .sidebar-button.button:backdrop:active,
         .header-bar.selection-mode .titlebutton.button:backdrop:active,
         .header-bar.selection-mode .button.flat:backdrop:checked,
+        .header-bar.selection-mode .sidebar-button.button:backdrop:checked,
         .header-bar.selection-mode .titlebutton.button:backdrop:checked {
           color: #d4e3f3;
           border-color: #2a76c6;
           background-image: linear-gradient(to bottom, #2a76c6);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(164, 199, 236, 0);
           border-color: #184472; }
-        .titlebar.selection-mode .button:backdrop:insensitive, .titlebar.selection-mode 
.button.flat:backdrop:insensitive,
+        .titlebar.selection-mode .button:backdrop:insensitive, .titlebar.selection-mode 
.button.flat:backdrop:insensitive, .titlebar.selection-mode .sidebar-button.button:backdrop:insensitive,
         .titlebar.selection-mode .titlebutton.button:backdrop:insensitive,
         .header-bar.selection-mode .button:backdrop:insensitive,
         .header-bar.selection-mode .button.flat:backdrop:insensitive,
+        .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive,
         .header-bar.selection-mode .titlebutton.button:backdrop:insensitive {
           color: #9ac1e9;
           border-color: #65a0de;
@@ -1662,51 +1710,59 @@ GtkComboBox {
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(164, 199, 236, 0);
           border-color: #184472; }
-          .titlebar.selection-mode .button:backdrop:insensitive > .label, .titlebar.selection-mode 
.header-bar .button.titlebutton:backdrop:insensitive > .label, .titlebar.selection-mode 
.button.flat:backdrop:insensitive > .label, .titlebar.selection-mode .header-bar 
.titlebutton.button:backdrop:insensitive > .label,
+          .titlebar.selection-mode .button:backdrop:insensitive > .label, .titlebar.selection-mode 
.header-bar .button.titlebutton:backdrop:insensitive > .label, .titlebar.selection-mode 
.button.flat:backdrop:insensitive > .label, .titlebar.selection-mode 
.sidebar-button.button:backdrop:insensitive > .label, .titlebar.selection-mode .header-bar 
.titlebutton.button:backdrop:insensitive > .label,
           .titlebar.selection-mode .titlebutton.button:backdrop:insensitive > .label,
           .header-bar.selection-mode .button:backdrop:insensitive > .label,
           .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive > .label,
+          .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive > .label,
           .header-bar.selection-mode .titlebutton.button:backdrop:insensitive > .label,
           .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive > .label {
             color: inherit; }
-        .titlebar.selection-mode .button:backdrop:insensitive:active, .titlebar.selection-mode 
.button:backdrop:insensitive:checked, .titlebar.selection-mode .button.flat:backdrop:insensitive:active,
-        .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active, .titlebar.selection-mode 
.button.flat:backdrop:insensitive:checked,
+        .titlebar.selection-mode .button:backdrop:insensitive:active, .titlebar.selection-mode 
.button:backdrop:insensitive:checked, .titlebar.selection-mode .button.flat:backdrop:insensitive:active, 
.titlebar.selection-mode .sidebar-button.button:backdrop:insensitive:active,
+        .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active, .titlebar.selection-mode 
.button.flat:backdrop:insensitive:checked, .titlebar.selection-mode 
.sidebar-button.button:backdrop:insensitive:checked,
         .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:checked,
         .header-bar.selection-mode .button:backdrop:insensitive:active,
         .header-bar.selection-mode .button:backdrop:insensitive:checked,
         .header-bar.selection-mode .button.flat:backdrop:insensitive:active,
+        .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive:active,
         .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:active,
         .header-bar.selection-mode .button.flat:backdrop:insensitive:checked,
+        .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive:checked,
         .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:checked {
           color: #8db8e6;
           border-color: #5093da;
           background-image: linear-gradient(to bottom, #5093da);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(164, 199, 236, 0);
           border-color: #184472; }
-          .titlebar.selection-mode .button:backdrop:insensitive:active > .label, .titlebar.selection-mode 
.header-bar .button.titlebutton:backdrop:insensitive:active > .label, .titlebar.selection-mode 
.button:backdrop:insensitive:checked > .label, .titlebar.selection-mode .header-bar 
.button.titlebutton:backdrop:insensitive:checked > .label, .titlebar.selection-mode 
.button.flat:backdrop:insensitive:active > .label, .titlebar.selection-mode .header-bar 
.titlebutton.button:backdrop:insensitive:active > .label,
-          .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label, 
.titlebar.selection-mode .button.flat:backdrop:insensitive:checked > .label, .titlebar.selection-mode 
.header-bar .titlebutton.button:backdrop:insensitive:checked > .label,
+          .titlebar.selection-mode .button:backdrop:insensitive:active > .label, .titlebar.selection-mode 
.header-bar .button.titlebutton:backdrop:insensitive:active > .label, .titlebar.selection-mode 
.button:backdrop:insensitive:checked > .label, .titlebar.selection-mode .header-bar 
.button.titlebutton:backdrop:insensitive:checked > .label, .titlebar.selection-mode 
.button.flat:backdrop:insensitive:active > .label, .titlebar.selection-mode 
.sidebar-button.button:backdrop:insensitive:active > .label, .titlebar.selection-mode .header-bar 
.titlebutton.button:backdrop:insensitive:active > .label,
+          .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label, 
.titlebar.selection-mode .button.flat:backdrop:insensitive:checked > .label, .titlebar.selection-mode 
.sidebar-button.button:backdrop:insensitive:checked > .label, .titlebar.selection-mode .header-bar 
.titlebutton.button:backdrop:insensitive:checked > .label,
           .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .button:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .button:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive:active > .label,
+          .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive:checked > .label,
+          .header-bar.selection-mode .sidebar-button.button:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
-      .titlebar.selection-mode .button.flat:backdrop,
-      .titlebar.selection-mode .titlebutton.button:backdrop, .titlebar.selection-mode 
.button.flat:insensitive,
-      .titlebar.selection-mode .titlebutton.button:insensitive, .titlebar.selection-mode 
.button.flat:insensitive:backdrop,
+      .titlebar.selection-mode .button.flat:backdrop, .titlebar.selection-mode 
.sidebar-button.button:backdrop,
+      .titlebar.selection-mode .titlebutton.button:backdrop, .titlebar.selection-mode 
.button.flat:insensitive, .titlebar.selection-mode .sidebar-button.button:insensitive,
+      .titlebar.selection-mode .titlebutton.button:insensitive, .titlebar.selection-mode 
.button.flat:insensitive:backdrop, .titlebar.selection-mode .sidebar-button.button:insensitive:backdrop,
       .titlebar.selection-mode .titlebutton.button:insensitive:backdrop,
       .header-bar.selection-mode .button.flat:backdrop,
+      .header-bar.selection-mode .sidebar-button.button:backdrop,
       .header-bar.selection-mode .titlebutton.button:backdrop,
       .header-bar.selection-mode .button.flat:insensitive,
+      .header-bar.selection-mode .sidebar-button.button:insensitive,
       .header-bar.selection-mode .titlebutton.button:insensitive,
       .header-bar.selection-mode .button.flat:insensitive:backdrop,
+      .header-bar.selection-mode .sidebar-button.button:insensitive:backdrop,
       .header-bar.selection-mode .titlebutton.button:insensitive:backdrop {
         border-color: transparent;
         background-color: transparent;
@@ -2073,10 +2129,11 @@ column-header .titlebar .button.titlebutton,
   .popover > .location-bar, .popover.osd > .toolbar, .popover.osd > .inline-toolbar, .popover.osd > 
.search-bar, .popover.osd > .location-bar {
     border-style: none;
     background-color: transparent; }
-  .popover .button.flat, .popover .header-bar .titlebutton.button, .header-bar .popover .titlebutton.button,
+  .popover .button.flat, .popover .sidebar-button.button, .popover .header-bar .titlebutton.button, 
.header-bar .popover .titlebutton.button,
   .popover .titlebar .titlebutton.button,
   .titlebar .popover .titlebutton.button,
   .popover .button.flat:hover,
+  .popover .sidebar-button.button:hover,
   .popover .header-bar .titlebutton.button:hover,
   .header-bar .popover .titlebutton.button:hover,
   .popover .titlebar .titlebutton.button:hover,
@@ -2561,7 +2618,7 @@ GtkSwitch {
 .check {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked.png"), url("assets/checkbox-unchecked 2 
png"));
   icon-shadow: 0 1px 0 white; }
-  .check.button.flat, .header-bar .check.titlebutton.button,
+  .check.button.flat, .check.sidebar-button.button, .header-bar .check.titlebutton.button,
   .titlebar .check.titlebutton.button {
     icon-shadow: none; }
 
@@ -2572,7 +2629,7 @@ GtkSwitch {
 .check:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked-hover.png"), 
url("assets/checkbox-unchecked-hover 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .check:hover.button.flat, .header-bar .check.titlebutton.button:hover,
+  .check:hover.button.flat, .check.sidebar-button.button:hover, .header-bar .check.titlebutton.button:hover,
   .titlebar .check.titlebutton.button:hover {
     icon-shadow: none; }
 
@@ -2583,7 +2640,7 @@ GtkSwitch {
 .check:active {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked-active.png"), 
url("assets/checkbox-unchecked-active 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .check:active.button.flat, .header-bar .check.titlebutton.button:active,
+  .check:active.button.flat, .check.sidebar-button.button:active, .header-bar 
.check.titlebutton.button:active,
   .titlebar .check.titlebutton.button:active {
     icon-shadow: none; }
 
@@ -2594,7 +2651,7 @@ GtkSwitch {
 .check:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked-insensitive.png"), 
url("assets/checkbox-unchecked-insensitive 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .check:insensitive.button.flat, .header-bar .check.titlebutton.button:insensitive,
+  .check:insensitive.button.flat, .check.sidebar-button.button:insensitive, .header-bar 
.check.titlebutton.button:insensitive,
   .titlebar .check.titlebutton.button:insensitive {
     icon-shadow: none; }
 
@@ -2605,7 +2662,7 @@ GtkSwitch {
 .check:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked-backdrop.png"), 
url("assets/checkbox-unchecked-backdrop 2 png"));
   icon-shadow: none; }
-  .check:backdrop.button.flat, .header-bar .check.titlebutton.button:backdrop,
+  .check:backdrop.button.flat, .check.sidebar-button.button:backdrop, .header-bar 
.check.titlebutton.button:backdrop,
   .titlebar .check.titlebutton.button:backdrop {
     icon-shadow: none; }
 
@@ -2616,7 +2673,7 @@ GtkSwitch {
 .check:backdrop:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-unchecked-backdrop-insensitive.png"), 
url("assets/checkbox-unchecked-backdrop-insensitive 2 png"));
   icon-shadow: none; }
-  .check:backdrop:insensitive.button.flat, .header-bar .check.titlebutton.button:backdrop:insensitive,
+  .check:backdrop:insensitive.button.flat, .check.sidebar-button.button:backdrop:insensitive, .header-bar 
.check.titlebutton.button:backdrop:insensitive,
   .titlebar .check.titlebutton.button:backdrop:insensitive {
     icon-shadow: none; }
 
@@ -2627,7 +2684,7 @@ GtkSwitch {
 .check:inconsistent {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed.png"), url("assets/checkbox-mixed 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .check:inconsistent.button.flat, .header-bar .check.titlebutton.button:inconsistent,
+  .check:inconsistent.button.flat, .check.sidebar-button.button:inconsistent, .header-bar 
.check.titlebutton.button:inconsistent,
   .titlebar .check.titlebutton.button:inconsistent {
     icon-shadow: none; }
 
@@ -2638,7 +2695,7 @@ GtkSwitch {
 .check:inconsistent:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed-hover.png"), url("assets/checkbox-mixed-hover 2 
png"));
   icon-shadow: 0 1px 0 white; }
-  .check:inconsistent:hover.button.flat, .header-bar .check.titlebutton.button:inconsistent:hover,
+  .check:inconsistent:hover.button.flat, .check.sidebar-button.button:inconsistent:hover, .header-bar 
.check.titlebutton.button:inconsistent:hover,
   .titlebar .check.titlebutton.button:inconsistent:hover {
     icon-shadow: none; }
 
@@ -2649,7 +2706,7 @@ GtkSwitch {
 .check:inconsistent:selected {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed-active.png"), url("assets/checkbox-mixed-active 2 
png"));
   icon-shadow: 0 1px 0 white; }
-  .check:inconsistent:selected.button.flat, .header-bar .check.titlebutton.button:inconsistent:selected,
+  .check:inconsistent:selected.button.flat, .check.sidebar-button.button:inconsistent:selected, .header-bar 
.check.titlebutton.button:inconsistent:selected,
   .titlebar .check.titlebutton.button:inconsistent:selected {
     icon-shadow: none; }
 
@@ -2660,7 +2717,7 @@ GtkSwitch {
 .check:inconsistent:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed-backdrop.png"), 
url("assets/checkbox-mixed-backdrop 2 png"));
   icon-shadow: none; }
-  .check:inconsistent:backdrop.button.flat, .header-bar .check.titlebutton.button:inconsistent:backdrop,
+  .check:inconsistent:backdrop.button.flat, .check.sidebar-button.button:inconsistent:backdrop, .header-bar 
.check.titlebutton.button:inconsistent:backdrop,
   .titlebar .check.titlebutton.button:inconsistent:backdrop {
     icon-shadow: none; }
 
@@ -2671,7 +2728,7 @@ GtkSwitch {
 .check:inconsistent:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed-insensitive.png"), 
url("assets/checkbox-mixed-insensitive 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .check:inconsistent:insensitive.button.flat, .header-bar 
.check.titlebutton.button:inconsistent:insensitive,
+  .check:inconsistent:insensitive.button.flat, .check.sidebar-button.button:inconsistent:insensitive, 
.header-bar .check.titlebutton.button:inconsistent:insensitive,
   .titlebar .check.titlebutton.button:inconsistent:insensitive {
     icon-shadow: none; }
 
@@ -2682,7 +2739,7 @@ GtkSwitch {
 .check:inconsistent:insensitive:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-mixed-backdrop-insensitive.png"), 
url("assets/checkbox-mixed-backdrop-insensitive 2 png"));
   icon-shadow: none; }
-  .check:inconsistent:insensitive:backdrop.button.flat, .header-bar 
.check.titlebutton.button:inconsistent:insensitive:backdrop,
+  .check:inconsistent:insensitive:backdrop.button.flat, 
.check.sidebar-button.button:inconsistent:insensitive:backdrop, .header-bar 
.check.titlebutton.button:inconsistent:insensitive:backdrop,
   .titlebar .check.titlebutton.button:inconsistent:insensitive:backdrop {
     icon-shadow: none; }
 
@@ -2693,7 +2750,7 @@ GtkSwitch {
 .check:checked {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked.png"), url("assets/checkbox-checked 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .check:checked.button.flat, .header-bar .check.titlebutton.button:checked,
+  .check:checked.button.flat, .check.sidebar-button.button:checked, .header-bar 
.check.titlebutton.button:checked,
   .titlebar .check.titlebutton.button:checked {
     icon-shadow: none; }
 
@@ -2704,7 +2761,7 @@ GtkSwitch {
 .check:checked:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked-insensitive.png"), 
url("assets/checkbox-checked-insensitive 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .check:checked:insensitive.button.flat, .header-bar .check.titlebutton.button:checked:insensitive,
+  .check:checked:insensitive.button.flat, .check.sidebar-button.button:checked:insensitive, .header-bar 
.check.titlebutton.button:checked:insensitive,
   .titlebar .check.titlebutton.button:checked:insensitive {
     icon-shadow: none; }
 
@@ -2715,7 +2772,7 @@ GtkSwitch {
 .check:checked:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked-hover.png"), url("assets/checkbox-checked-hover 
2 png"));
   icon-shadow: 0 1px 0 white; }
-  .check:checked:hover.button.flat, .header-bar .check.titlebutton.button:checked:hover,
+  .check:checked:hover.button.flat, .check.sidebar-button.button:checked:hover, .header-bar 
.check.titlebutton.button:checked:hover,
   .titlebar .check.titlebutton.button:checked:hover {
     icon-shadow: none; }
 
@@ -2726,7 +2783,7 @@ GtkSwitch {
 .check:checked:active {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked-active.png"), 
url("assets/checkbox-checked-active 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .check:checked:active.button.flat, .header-bar .check.titlebutton.button:checked:active,
+  .check:checked:active.button.flat, .check.sidebar-button.button:checked:active, .header-bar 
.check.titlebutton.button:checked:active,
   .titlebar .check.titlebutton.button:checked:active {
     icon-shadow: none; }
 
@@ -2737,7 +2794,7 @@ GtkSwitch {
 .check:backdrop:checked {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked-backdrop.png"), 
url("assets/checkbox-checked-backdrop 2 png"));
   icon-shadow: none; }
-  .check:backdrop:checked.button.flat, .header-bar .check.titlebutton.button:backdrop:checked,
+  .check:backdrop:checked.button.flat, .check.sidebar-button.button:backdrop:checked, .header-bar 
.check.titlebutton.button:backdrop:checked,
   .titlebar .check.titlebutton.button:backdrop:checked {
     icon-shadow: none; }
 
@@ -2748,7 +2805,7 @@ GtkSwitch {
 .check:backdrop:checked:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/checkbox-checked-backdrop-insensitive.png"), 
url("assets/checkbox-checked-backdrop-insensitive 2 png"));
   icon-shadow: none; }
-  .check:backdrop:checked:insensitive.button.flat, .header-bar 
.check.titlebutton.button:backdrop:checked:insensitive,
+  .check:backdrop:checked:insensitive.button.flat, 
.check.sidebar-button.button:backdrop:checked:insensitive, .header-bar 
.check.titlebutton.button:backdrop:checked:insensitive,
   .titlebar .check.titlebutton.button:backdrop:checked:insensitive {
     icon-shadow: none; }
 
@@ -2772,7 +2829,7 @@ GtkSwitch {
 .radio {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked.png"), url("assets/radio-unchecked 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .radio.button.flat, .header-bar .radio.titlebutton.button,
+  .radio.button.flat, .radio.sidebar-button.button, .header-bar .radio.titlebutton.button,
   .titlebar .radio.titlebutton.button {
     icon-shadow: none; }
 
@@ -2783,7 +2840,7 @@ GtkSwitch {
 .radio:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked-hover.png"), url("assets/radio-unchecked-hover 2 
png"));
   icon-shadow: 0 1px 0 white; }
-  .radio:hover.button.flat, .header-bar .radio.titlebutton.button:hover,
+  .radio:hover.button.flat, .radio.sidebar-button.button:hover, .header-bar .radio.titlebutton.button:hover,
   .titlebar .radio.titlebutton.button:hover {
     icon-shadow: none; }
 
@@ -2794,7 +2851,7 @@ GtkSwitch {
 .radio:active {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked-active.png"), url("assets/radio-unchecked-active 
2 png"));
   icon-shadow: 0 1px 0 white; }
-  .radio:active.button.flat, .header-bar .radio.titlebutton.button:active,
+  .radio:active.button.flat, .radio.sidebar-button.button:active, .header-bar 
.radio.titlebutton.button:active,
   .titlebar .radio.titlebutton.button:active {
     icon-shadow: none; }
 
@@ -2805,7 +2862,7 @@ GtkSwitch {
 .radio:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked-insensitive.png"), 
url("assets/radio-unchecked-insensitive 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .radio:insensitive.button.flat, .header-bar .radio.titlebutton.button:insensitive,
+  .radio:insensitive.button.flat, .radio.sidebar-button.button:insensitive, .header-bar 
.radio.titlebutton.button:insensitive,
   .titlebar .radio.titlebutton.button:insensitive {
     icon-shadow: none; }
 
@@ -2816,7 +2873,7 @@ GtkSwitch {
 .radio:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked-backdrop.png"), 
url("assets/radio-unchecked-backdrop 2 png"));
   icon-shadow: none; }
-  .radio:backdrop.button.flat, .header-bar .radio.titlebutton.button:backdrop,
+  .radio:backdrop.button.flat, .radio.sidebar-button.button:backdrop, .header-bar 
.radio.titlebutton.button:backdrop,
   .titlebar .radio.titlebutton.button:backdrop {
     icon-shadow: none; }
 
@@ -2827,7 +2884,7 @@ GtkSwitch {
 .radio:backdrop:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-unchecked-backdrop-insensitive.png"), 
url("assets/radio-unchecked-backdrop-insensitive 2 png"));
   icon-shadow: none; }
-  .radio:backdrop:insensitive.button.flat, .header-bar .radio.titlebutton.button:backdrop:insensitive,
+  .radio:backdrop:insensitive.button.flat, .radio.sidebar-button.button:backdrop:insensitive, .header-bar 
.radio.titlebutton.button:backdrop:insensitive,
   .titlebar .radio.titlebutton.button:backdrop:insensitive {
     icon-shadow: none; }
 
@@ -2838,7 +2895,7 @@ GtkSwitch {
 .radio:inconsistent {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed.png"), url("assets/radio-mixed 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .radio:inconsistent.button.flat, .header-bar .radio.titlebutton.button:inconsistent,
+  .radio:inconsistent.button.flat, .radio.sidebar-button.button:inconsistent, .header-bar 
.radio.titlebutton.button:inconsistent,
   .titlebar .radio.titlebutton.button:inconsistent {
     icon-shadow: none; }
 
@@ -2849,7 +2906,7 @@ GtkSwitch {
 .radio:inconsistent:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed-hover.png"), url("assets/radio-mixed-hover 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .radio:inconsistent:hover.button.flat, .header-bar .radio.titlebutton.button:inconsistent:hover,
+  .radio:inconsistent:hover.button.flat, .radio.sidebar-button.button:inconsistent:hover, .header-bar 
.radio.titlebutton.button:inconsistent:hover,
   .titlebar .radio.titlebutton.button:inconsistent:hover {
     icon-shadow: none; }
 
@@ -2860,7 +2917,7 @@ GtkSwitch {
 .radio:inconsistent:selected {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed-active.png"), url("assets/radio-mixed-active 2 
png"));
   icon-shadow: 0 1px 0 white; }
-  .radio:inconsistent:selected.button.flat, .header-bar .radio.titlebutton.button:inconsistent:selected,
+  .radio:inconsistent:selected.button.flat, .radio.sidebar-button.button:inconsistent:selected, .header-bar 
.radio.titlebutton.button:inconsistent:selected,
   .titlebar .radio.titlebutton.button:inconsistent:selected {
     icon-shadow: none; }
 
@@ -2871,7 +2928,7 @@ GtkSwitch {
 .radio:inconsistent:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed-backdrop.png"), url("assets/radio-mixed-backdrop 2 
png"));
   icon-shadow: none; }
-  .radio:inconsistent:backdrop.button.flat, .header-bar .radio.titlebutton.button:inconsistent:backdrop,
+  .radio:inconsistent:backdrop.button.flat, .radio.sidebar-button.button:inconsistent:backdrop, .header-bar 
.radio.titlebutton.button:inconsistent:backdrop,
   .titlebar .radio.titlebutton.button:inconsistent:backdrop {
     icon-shadow: none; }
 
@@ -2882,7 +2939,7 @@ GtkSwitch {
 .radio:inconsistent:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed-insensitive.png"), 
url("assets/radio-mixed-insensitive 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .radio:inconsistent:insensitive.button.flat, .header-bar 
.radio.titlebutton.button:inconsistent:insensitive,
+  .radio:inconsistent:insensitive.button.flat, .radio.sidebar-button.button:inconsistent:insensitive, 
.header-bar .radio.titlebutton.button:inconsistent:insensitive,
   .titlebar .radio.titlebutton.button:inconsistent:insensitive {
     icon-shadow: none; }
 
@@ -2893,7 +2950,7 @@ GtkSwitch {
 .radio:inconsistent:insensitive:backdrop {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-mixed-backdrop-insensitive.png"), 
url("assets/radio-mixed-backdrop-insensitive 2 png"));
   icon-shadow: none; }
-  .radio:inconsistent:insensitive:backdrop.button.flat, .header-bar 
.radio.titlebutton.button:inconsistent:insensitive:backdrop,
+  .radio:inconsistent:insensitive:backdrop.button.flat, 
.radio.sidebar-button.button:inconsistent:insensitive:backdrop, .header-bar 
.radio.titlebutton.button:inconsistent:insensitive:backdrop,
   .titlebar .radio.titlebutton.button:inconsistent:insensitive:backdrop {
     icon-shadow: none; }
 
@@ -2904,7 +2961,7 @@ GtkSwitch {
 .radio:checked {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked.png"), url("assets/radio-checked 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .radio:checked.button.flat, .header-bar .radio.titlebutton.button:checked,
+  .radio:checked.button.flat, .radio.sidebar-button.button:checked, .header-bar 
.radio.titlebutton.button:checked,
   .titlebar .radio.titlebutton.button:checked {
     icon-shadow: none; }
 
@@ -2915,7 +2972,7 @@ GtkSwitch {
 .radio:checked:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked-insensitive.png"), 
url("assets/radio-checked-insensitive 2 png"));
   icon-shadow: 0 1px 0 white; }
-  .radio:checked:insensitive.button.flat, .header-bar .radio.titlebutton.button:checked:insensitive,
+  .radio:checked:insensitive.button.flat, .radio.sidebar-button.button:checked:insensitive, .header-bar 
.radio.titlebutton.button:checked:insensitive,
   .titlebar .radio.titlebutton.button:checked:insensitive {
     icon-shadow: none; }
 
@@ -2926,7 +2983,7 @@ GtkSwitch {
 .radio:checked:hover {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked-hover.png"), url("assets/radio-checked-hover 2 
png"));
   icon-shadow: 0 1px 0 white; }
-  .radio:checked:hover.button.flat, .header-bar .radio.titlebutton.button:checked:hover,
+  .radio:checked:hover.button.flat, .radio.sidebar-button.button:checked:hover, .header-bar 
.radio.titlebutton.button:checked:hover,
   .titlebar .radio.titlebutton.button:checked:hover {
     icon-shadow: none; }
 
@@ -2937,7 +2994,7 @@ GtkSwitch {
 .radio:checked:active {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked-active.png"), url("assets/radio-checked-active 2 
png"));
   icon-shadow: 0 1px 0 white; }
-  .radio:checked:active.button.flat, .header-bar .radio.titlebutton.button:checked:active,
+  .radio:checked:active.button.flat, .radio.sidebar-button.button:checked:active, .header-bar 
.radio.titlebutton.button:checked:active,
   .titlebar .radio.titlebutton.button:checked:active {
     icon-shadow: none; }
 
@@ -2948,7 +3005,7 @@ GtkSwitch {
 .radio:backdrop:checked {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked-backdrop.png"), url("assets/radio-checked-backdrop 
2 png"));
   icon-shadow: none; }
-  .radio:backdrop:checked.button.flat, .header-bar .radio.titlebutton.button:backdrop:checked,
+  .radio:backdrop:checked.button.flat, .radio.sidebar-button.button:backdrop:checked, .header-bar 
.radio.titlebutton.button:backdrop:checked,
   .titlebar .radio.titlebutton.button:backdrop:checked {
     icon-shadow: none; }
 
@@ -2959,7 +3016,7 @@ GtkSwitch {
 .radio:backdrop:checked:insensitive {
   -gtk-icon-source: -gtk-scaled(url("assets/radio-checked-backdrop-insensitive.png"), 
url("assets/radio-checked-backdrop-insensitive 2 png"));
   icon-shadow: none; }
-  .radio:backdrop:checked:insensitive.button.flat, .header-bar 
.radio.titlebutton.button:backdrop:checked:insensitive,
+  .radio:backdrop:checked:insensitive.button.flat, 
.radio.sidebar-button.button:backdrop:checked:insensitive, .header-bar 
.radio.titlebutton.button:backdrop:checked:insensitive,
   .titlebar .radio.titlebutton.button:backdrop:checked:insensitive {
     icon-shadow: none; }
 
@@ -3606,10 +3663,9 @@ GtkProgressBar {
 GtkScrolledWindow GtkViewport.frame {
   border-style: none; }
 
-.separator, GtkPlacesSidebar.sidebar .view .separator,
-GtkPlacesSidebar.sidebar .view .separator:backdrop {
+.separator {
   color: rgba(0, 0, 0, 0.1); }
-  GtkFileChooserButton .separator.vertical, GtkFileChooserButton GtkPlacesSidebar.sidebar .view 
.vertical.separator, GtkPlacesSidebar.sidebar .view GtkFileChooserButton .vertical.separator, GtkFontButton 
.separator.vertical, GtkFontButton GtkPlacesSidebar.sidebar .view .vertical.separator, 
GtkPlacesSidebar.sidebar .view GtkFontButton .vertical.separator {
+  GtkFileChooserButton .separator.vertical, GtkFontButton .separator.vertical {
     -GtkWidget-wide-separators: true; }
 
 /*********
@@ -3663,7 +3719,7 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
   icon-shadow: 0 1px rgba(255, 255, 255, 0.76923);
   box-shadow: inset 0 1px white;
   border-color: #184472; }
-  .list-row:selected .button.flat, .list-row:selected .header-bar .titlebutton.button, .header-bar 
.list-row:selected .titlebutton.button,
+  .list-row:selected .button.flat, .list-row:selected .sidebar-button.button, .list-row:selected .header-bar 
.titlebutton.button, .header-bar .list-row:selected .titlebutton.button,
   .list-row:selected .titlebar .titlebutton.button,
   .titlebar .list-row:selected .titlebutton.button {
     border-color: transparent;
@@ -3691,7 +3747,7 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
     icon-shadow: 0 1px rgba(255, 255, 255, 0.76923);
     box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6);
     border-color: #184472; }
-  .list-row:selected .button:backdrop, .list-row:selected .button.flat:backdrop, .list-row:selected 
.header-bar .titlebutton.button:backdrop, .header-bar .list-row:selected .titlebutton.button:backdrop,
+  .list-row:selected .button:backdrop, .list-row:selected .button.flat:backdrop, .list-row:selected 
.sidebar-button.button:backdrop, .list-row:selected .header-bar .titlebutton.button:backdrop, .header-bar 
.list-row:selected .titlebutton.button:backdrop,
   .list-row:selected .titlebar .titlebutton.button:backdrop,
   .titlebar .list-row:selected .titlebutton.button:backdrop {
     color: #8d9091;
@@ -3701,9 +3757,9 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     border-color: #184472; }
-    .list-row:selected .button:backdrop:active, .list-row:selected .button:backdrop:checked, 
.list-row:selected .button.flat:backdrop:active, .list-row:selected .header-bar 
.titlebutton.button:backdrop:active, .header-bar .list-row:selected .titlebutton.button:backdrop:active,
+    .list-row:selected .button:backdrop:active, .list-row:selected .button:backdrop:checked, 
.list-row:selected .button.flat:backdrop:active, .list-row:selected .sidebar-button.button:backdrop:active, 
.list-row:selected .header-bar .titlebutton.button:backdrop:active, .header-bar .list-row:selected 
.titlebutton.button:backdrop:active,
     .list-row:selected .titlebar .titlebutton.button:backdrop:active,
-    .titlebar .list-row:selected .titlebutton.button:backdrop:active, .list-row:selected 
.button.flat:backdrop:checked, .list-row:selected .header-bar .titlebutton.button:backdrop:checked, 
.header-bar .list-row:selected .titlebutton.button:backdrop:checked,
+    .titlebar .list-row:selected .titlebutton.button:backdrop:active, .list-row:selected 
.button.flat:backdrop:checked, .list-row:selected .sidebar-button.button:backdrop:checked, .list-row:selected 
.header-bar .titlebutton.button:backdrop:checked, .header-bar .list-row:selected 
.titlebutton.button:backdrop:checked,
     .list-row:selected .titlebar .titlebutton.button:backdrop:checked,
     .titlebar .list-row:selected .titlebutton.button:backdrop:checked {
       color: #8d9091;
@@ -3711,7 +3767,7 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
       background-image: linear-gradient(to bottom, #d4d4d4);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0);
       border-color: #184472; }
-    .list-row:selected .button:backdrop:insensitive, .list-row:selected .button.flat:backdrop:insensitive, 
.list-row:selected .header-bar .titlebutton.button:backdrop:insensitive, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive,
+    .list-row:selected .button:backdrop:insensitive, .list-row:selected .button.flat:backdrop:insensitive, 
.list-row:selected .sidebar-button.button:backdrop:insensitive, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive,
     .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive,
     .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive {
       color: #c7c7c7;
@@ -3722,13 +3778,13 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
       box-shadow: inset 0 1px rgba(255, 255, 255, 0);
       border-color: #184472; }
       .list-row:selected .button:backdrop:insensitive > .label, .list-row:selected .header-bar 
.button.titlebutton:backdrop:insensitive > .label,
-      .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive > .label, .list-row:selected 
.button.flat:backdrop:insensitive > .label, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive > .label, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive > .label,
+      .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive > .label, .list-row:selected 
.button.flat:backdrop:insensitive > .label, .list-row:selected .sidebar-button.button:backdrop:insensitive > 
.label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive > .label, .header-bar 
.list-row:selected .titlebutton.button:backdrop:insensitive > .label,
       .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive > .label,
       .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive > .label {
         color: inherit; }
-      .list-row:selected .button:backdrop:insensitive:active, .list-row:selected 
.button:backdrop:insensitive:checked, .list-row:selected .button.flat:backdrop:insensitive:active, 
.list-row:selected .header-bar .titlebutton.button:backdrop:insensitive:active, .header-bar 
.list-row:selected .titlebutton.button:backdrop:insensitive:active,
+      .list-row:selected .button:backdrop:insensitive:active, .list-row:selected 
.button:backdrop:insensitive:checked, .list-row:selected .button.flat:backdrop:insensitive:active, 
.list-row:selected .sidebar-button.button:backdrop:insensitive:active, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:active, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:active,
       .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:active,
-      .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:active, .list-row:selected 
.button.flat:backdrop:insensitive:checked, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:checked, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:checked,
+      .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:active, .list-row:selected 
.button.flat:backdrop:insensitive:checked, .list-row:selected 
.sidebar-button.button:backdrop:insensitive:checked, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:checked, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:checked,
       .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:checked,
       .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:checked {
         color: #c7c7c7;
@@ -3738,13 +3794,13 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
         border-color: #184472; }
         .list-row:selected .button:backdrop:insensitive:active > .label, .list-row:selected .header-bar 
.button.titlebutton:backdrop:insensitive:active > .label,
         .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive:active > .label, 
.list-row:selected .button:backdrop:insensitive:checked > .label, .list-row:selected .header-bar 
.button.titlebutton:backdrop:insensitive:checked > .label,
-        .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, 
.list-row:selected .button.flat:backdrop:insensitive:active > .label, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:active > .label, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:active > .label,
+        .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, 
.list-row:selected .button.flat:backdrop:insensitive:active > .label, .list-row:selected 
.sidebar-button.button:backdrop:insensitive:active > .label, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:active > .label, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:active > .label,
         .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:active > .label,
-        .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:active > .label, 
.list-row:selected .button.flat:backdrop:insensitive:checked > .label, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:checked > .label, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:checked > .label,
+        .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:active > .label, 
.list-row:selected .button.flat:backdrop:insensitive:checked > .label, .list-row:selected 
.sidebar-button.button:backdrop:insensitive:checked > .label, .list-row:selected .header-bar 
.titlebutton.button:backdrop:insensitive:checked > .label, .header-bar .list-row:selected 
.titlebutton.button:backdrop:insensitive:checked > .label,
         .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:checked > .label,
         .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:checked > .label {
           color: inherit; }
-  .list-row:selected .button.flat:backdrop, .list-row:selected .header-bar .titlebutton.button:backdrop, 
.header-bar .list-row:selected .titlebutton.button:backdrop,
+  .list-row:selected .button.flat:backdrop, .list-row:selected .sidebar-button.button:backdrop, 
.list-row:selected .header-bar .titlebutton.button:backdrop, .header-bar .list-row:selected 
.titlebutton.button:backdrop,
   .list-row:selected .titlebar .titlebutton.button:backdrop,
   .titlebar .list-row:selected .titlebutton.button:backdrop {
     border-color: transparent;
@@ -3808,10 +3864,11 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
     text-shadow: 0 1px black;
     icon-shadow: 0 1px black;
     outline-color: rgba(238, 238, 236, 0.3); }
-    .app-notification .button.flat, .app-notification .header-bar .titlebutton.button, .header-bar 
.app-notification .titlebutton.button,
+    .app-notification .button.flat, .app-notification .sidebar-button.button, .app-notification .header-bar 
.titlebutton.button, .header-bar .app-notification .titlebutton.button,
     .app-notification .titlebar .titlebutton.button,
     .titlebar .app-notification .titlebutton.button,
     .app-notification.frame .button.flat,
+    .app-notification.frame .sidebar-button.button,
     .app-notification.frame .header-bar .titlebutton.button,
     .header-bar .app-notification.frame .titlebutton.button,
     .app-notification.frame .titlebar .titlebutton.button,
@@ -4103,27 +4160,31 @@ GtkFileChooserDialog .dialog-action-box {
   .sidebar:backdrop {
     background-color: #fafafa; }
 
-GtkPlacesSidebar.sidebar .view {
-  color: #2e3436;
-  background-color: transparent; }
-  GtkPlacesSidebar.sidebar .view .image {
-    color: #6b6f70; }
-    GtkPlacesSidebar.sidebar .view .image:selected {
-      color: #ecf3fb; }
-      GtkPlacesSidebar.sidebar .view .image:selected:backdrop {
-        color: #ecf3fb; }
-    GtkPlacesSidebar.sidebar .view .image:insensitive {
-      color: #adafb0; }
-    GtkPlacesSidebar.sidebar .view .image:backdrop {
-      color: #adafb0; }
-      GtkPlacesSidebar.sidebar .view .image:backdrop:insensitive {
-        color: #d6d6d6; }
-  GtkPlacesSidebar.sidebar .view:insensitive {
-    color: #8d9091; }
-  GtkPlacesSidebar.sidebar .view:backdrop {
-    color: #8d9091; }
-    GtkPlacesSidebar.sidebar .view:backdrop:insensitive {
-      color: #c7c7c7; }
+GtkPlacesSidebar.sidebar SidebarRow {
+  padding-left: 14px;
+  padding-right: 6px;
+  padding-top: 2px;
+  padding-bottom: 2px; }
+GtkPlacesSidebar.sidebar SidebarRow > GtkBox > GtkImage {
+  opacity: 0.7; }
+.sidebar-button.button, .header-bar .sidebar-button.button.titlebutton,
+.titlebar .sidebar-button.button.titlebutton {
+  border-radius: 100%;
+  outline-radius: 100%;
+  /*    &:hover:not(:active):not(:backdrop) {
+        background-image: none;
+        background-color: gtkalpha(currentColor, 0.1);
+        border-color: transparentize($borders_color, 1);
+        box-shadow: inset 0 0 transparentize(white, 1);
+        icon-shadow: none;
+      } */ }
+  .sidebar-button.button.image-button, .header-bar .sidebar-button.titlebutton.button,
+  .titlebar .sidebar-button.titlebutton.button {
+    padding: 6px; }
+  .sidebar-button.button:not(:hover):not(:active) > GtkImage, .header-bar 
.sidebar-button.button.titlebutton:not(:hover):not(:active) > GtkImage,
+  .titlebar .sidebar-button.button.titlebutton:not(:hover):not(:active) > GtkImage, 
.sidebar-button.button:backdrop > GtkImage, .header-bar .sidebar-button.button.titlebutton:backdrop > 
GtkImage,
+  .titlebar .sidebar-button.button.titlebutton:backdrop > GtkImage {
+    opacity: 0.7; }
 
 .sidebar-item {
   padding: 10px 4px; }
@@ -4480,13 +4541,13 @@ GtkVolumeButton.button, .header-bar GtkVolumeButton.button.titlebutton,
   .titlebar.selection-mode .titlebutton.button:backdrop {
     icon-shadow: none; }
 
-.view:selected, GtkCalendar:selected, .label:selected, .label:selected:focus, .label:selected:hover, 
.grid-child:selected, .entry:selected, .entry:selected:focus, .menuitem.button.flat:selected, .header-bar 
.menuitem.titlebutton.button:selected,
-.titlebar .menuitem.titlebutton.button:selected, .list-row:selected, .sidebar:selected, 
GtkPlacesSidebar.sidebar .view:selected, GtkPlacesSidebar.sidebar GtkCalendar:selected {
+.view:selected, GtkCalendar:selected, .label:selected, .label:selected:focus, .label:selected:hover, 
.grid-child:selected, .entry:selected, .entry:selected:focus, .menuitem.button.flat:selected, 
.menuitem.sidebar-button.button:selected, .header-bar .menuitem.titlebutton.button:selected,
+.titlebar .menuitem.titlebutton.button:selected, .list-row:selected, .sidebar:selected {
   background-color: #4a90d9;
   color: #ffffff;
   outline-color: rgba(255, 255, 255, 0.3); }
-  .view:backdrop:selected, GtkCalendar:backdrop:selected, .label:backdrop:selected, 
.grid-child:backdrop:selected, .entry:backdrop:selected, .menuitem.button.flat:backdrop:selected, .header-bar 
.menuitem.titlebutton.button:backdrop:selected,
-  .titlebar .menuitem.titlebutton.button:backdrop:selected, .list-row:backdrop:selected, 
.sidebar:backdrop:selected, GtkPlacesSidebar.sidebar .view:backdrop:selected, GtkPlacesSidebar.sidebar 
GtkCalendar:backdrop:selected {
+  .view:backdrop:selected, GtkCalendar:backdrop:selected, .label:backdrop:selected, 
.grid-child:backdrop:selected, .entry:backdrop:selected, .menuitem.button.flat:backdrop:selected, 
.menuitem.sidebar-button.button:backdrop:selected, .header-bar .menuitem.titlebutton.button:backdrop:selected,
+  .titlebar .menuitem.titlebutton.button:backdrop:selected, .list-row:backdrop:selected, 
.sidebar:backdrop:selected {
     color: #ffffff; }
 
 /* Decouple the font of context menus from their entry/textview */


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