[gtk+] Adwaita: simplify mixed buttons styling

[Lapo Calamandrei <lapo src gnome org>]

commit 296a7c24f946c2c612ddb881a557158f48cbc460
Author: Lapo Calamandrei <calamandrei gmail com>
Date:   Fri Feb 26 13:07:09 2016 +0100

    Adwaita: simplify mixed buttons styling

 gtk/theme/Adwaita/_common.scss           |   20 +++-----------------
 gtk/theme/Adwaita/gtk-contained-dark.css |   16 ++++------------
 gtk/theme/Adwaita/gtk-contained.css      |   16 ++++------------
 3 files changed, 11 insertions(+), 41 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 5687744..2942672 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -457,24 +457,10 @@ button {
     }
 
     &.text-button.image-button {
-      // those buttons needs uneven horizontal padding, we want the icon side
-      // to have the image-button padding, while the text side the text-button
-      // one, so we're adding the missing padding to the label depending on
-      // its position inside the button
-      padding-left: 0;
-      padding-right: 0;
-
-      label:first-child {
-        padding-left: 16px;
-        padding-right: 0;
-      }
-
-      label:last-child {
-        padding-left: 0;
-        padding-right: 16px;
-      }
+      padding-left: 8px;
+      padding-right: 8px;
 
-      image {
+      label {
         padding-left: 8px;
         padding-right: 8px;
       }
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index 3b13a93..62094f6 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -489,18 +489,10 @@ notebook > header > tabs > arrow, headerbar button.titlebutton,
     padding-right: 16px; }
   notebook > header > tabs > arrow.text-button.image-button, headerbar 
button.text-button.image-button.titlebutton,
   .titlebar button.text-button.image-button.titlebutton, button.text-button.image-button {
-    padding-left: 0;
-    padding-right: 0; }
-    notebook > header > tabs > arrow.text-button.image-button label:first-child, headerbar 
button.text-button.image-button.titlebutton label:first-child,
-    .titlebar button.text-button.image-button.titlebutton label:first-child, button.text-button.image-button 
label:first-child {
-      padding-left: 16px;
-      padding-right: 0; }
-    notebook > header > tabs > arrow.text-button.image-button label:last-child, headerbar 
button.text-button.image-button.titlebutton label:last-child,
-    .titlebar button.text-button.image-button.titlebutton label:last-child, button.text-button.image-button 
label:last-child {
-      padding-left: 0;
-      padding-right: 16px; }
-    notebook > header > tabs > arrow.text-button.image-button image, headerbar 
button.text-button.image-button.titlebutton image,
-    .titlebar button.text-button.image-button.titlebutton image, button.text-button.image-button image {
+    padding-left: 8px;
+    padding-right: 8px; }
+    notebook > header > tabs > arrow.text-button.image-button label, headerbar 
button.text-button.image-button.titlebutton label,
+    .titlebar button.text-button.image-button.titlebutton label, button.text-button.image-button label {
       padding-left: 8px;
       padding-right: 8px; }
 button.osd {
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index e8e2ee6..4544b3a 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -489,18 +489,10 @@ notebook > header > tabs > arrow, headerbar button.titlebutton,
     padding-right: 16px; }
   notebook > header > tabs > arrow.text-button.image-button, headerbar 
button.text-button.image-button.titlebutton,
   .titlebar button.text-button.image-button.titlebutton, button.text-button.image-button {
-    padding-left: 0;
-    padding-right: 0; }
-    notebook > header > tabs > arrow.text-button.image-button label:first-child, headerbar 
button.text-button.image-button.titlebutton label:first-child,
-    .titlebar button.text-button.image-button.titlebutton label:first-child, button.text-button.image-button 
label:first-child {
-      padding-left: 16px;
-      padding-right: 0; }
-    notebook > header > tabs > arrow.text-button.image-button label:last-child, headerbar 
button.text-button.image-button.titlebutton label:last-child,
-    .titlebar button.text-button.image-button.titlebutton label:last-child, button.text-button.image-button 
label:last-child {
-      padding-left: 0;
-      padding-right: 16px; }
-    notebook > header > tabs > arrow.text-button.image-button image, headerbar 
button.text-button.image-button.titlebutton image,
-    .titlebar button.text-button.image-button.titlebutton image, button.text-button.image-button image {
+    padding-left: 8px;
+    padding-right: 8px; }
+    notebook > header > tabs > arrow.text-button.image-button label, headerbar 
button.text-button.image-button.titlebutton label,
+    .titlebar button.text-button.image-button.titlebutton label, button.text-button.image-button label {
       padding-left: 8px;
       padding-right: 8px; }
 button.osd {