[gtk+/gtk-3-22] Adwaita: progressbar style fix

[Daniel Boles <dboles src gnome org>]

commit d55aa2a85965a1d943389bb55bea4404300f4940
Author: Lapo Calamandrei <calamandrei gmail com>
Date:   Wed Nov 23 16:00:57 2016 +0100

    Adwaita: progressbar style fix
    
    Reset styling on the progress node when trough node has the `empty'
    styleclass.
    
    See https://bugzilla.gnome.org/show_bug.cgi?id=774695

 gtk/theme/Adwaita/_common.scss           |    2 ++
 gtk/theme/Adwaita/gtk-contained-dark.css |    2 ++
 gtk/theme/Adwaita/gtk-contained.css      |    2 ++
 3 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 1c04ea3..acd4dfc 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -3265,6 +3265,8 @@ progressbar {
       border-radius: 0;
     }
   }
+
+  trough.empty progress { all: unset; } // makes the progress indicator disappear, when the fraction is 0
 }
 
 
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index fa424be..6232ba9 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -3699,6 +3699,8 @@ progressbar {
     progressbar.osd progress {
       border-style: none;
       border-radius: 0; }
+  progressbar trough.empty progress {
+    all: unset; }
 
 /*************
  * Level Bar *
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index fda0ccd..6104172 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -3730,6 +3730,8 @@ progressbar {
     progressbar.osd progress {
       border-style: none;
       border-radius: 0; }
+  progressbar trough.empty progress {
+    all: unset; }
 
 /*************
  * Level Bar *