[gtk+] Adwaita: correct background color for backdrop treeview column headers

[Lapo Calamandrei <lapo src gnome org>]

commit 8c57dcec282e55e0c4a6cba2b546347ad4f059b1
Author: Lapo Calamandrei <calamandrei gmail com>
Date:   Tue Jul 15 17:58:13 2014 +0200

    Adwaita: correct background color for backdrop treeview column headers

 gtk/resources/theme/Adwaita/_common.scss           |    1 +
 gtk/resources/theme/Adwaita/gtk-contained-dark.css |    3 ++-
 gtk/resources/theme/Adwaita/gtk-contained.css      |    3 ++-
 3 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/gtk/resources/theme/Adwaita/_common.scss b/gtk/resources/theme/Adwaita/_common.scss
index 1baa894..4617f7f 100644
--- a/gtk/resources/theme/Adwaita/_common.scss
+++ b/gtk/resources/theme/Adwaita/_common.scss
@@ -919,6 +919,7 @@ column-header.button.dnd { // for treeview-like derive widgets
     border-width: 0 1px 1px 0;
     color: mix($backdrop_fg_color, $backdrop_bg_color,50%);
     background-image: none;
+    background-color: $backdrop_base_color;
     &:insensitive {
       border-color: $backdrop_bg_color;
       background-image: none;
diff --git a/gtk/resources/theme/Adwaita/gtk-contained-dark.css 
b/gtk/resources/theme/Adwaita/gtk-contained-dark.css
index 09e75da..e92daa3 100644
--- a/gtk/resources/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/resources/theme/Adwaita/gtk-contained-dark.css
@@ -1083,7 +1083,8 @@ column-header .button, column-header .button:hover, column-header .button:active
     border-color: #393f3f;
     border-width: 0 1px 1px 0;
     color: #818584;
-    background-image: none; }
+    background-image: none;
+    background-color: #2c2c2c; }
     column-header .button:backdrop:insensitive {
       border-color: #393f3f;
       background-image: none; }
diff --git a/gtk/resources/theme/Adwaita/gtk-contained.css b/gtk/resources/theme/Adwaita/gtk-contained.css
index 7db54bf..59ac51d 100644
--- a/gtk/resources/theme/Adwaita/gtk-contained.css
+++ b/gtk/resources/theme/Adwaita/gtk-contained.css
@@ -1075,7 +1075,8 @@ column-header .button, column-header .button:hover, column-header .button:active
     border-color: #ededed;
     border-width: 0 1px 1px 0;
     color: #a0a3a3;
-    background-image: none; }
+    background-image: none;
+    background-color: #fcfcfc; }
     column-header .button:backdrop:insensitive {
       border-color: #ededed;
       background-image: none; }