[gtk+/gtk-3-20] Adwaita: progressbar style fix

[Daniel Boles <dboles src gnome org>]

commit 6db39715d9feb6dc56cd31dd3ad678e2049ddeda
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 34cfd52..7f4158f 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -3219,6 +3219,8 @@ 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 05ace12..c0c4626 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -3583,6 +3583,8 @@ 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 2ea9624..3135793 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -3612,6 +3612,8 @@ progressbar {
     progressbar.osd progress {
       border-style: none;
       border-radius: 0; }
+  progressbar trough.empty progress {
+    all: unset; }
 
 /*************
  * Level Bar *