[gnome-themes-standard] assistant: fix wrong background color for highlighted heading

[Cosimo Cecchi <cosimoc src gnome org>]

commit 69b2ba3ebbdf1b85cbe94e6e5eaf8beb54f1d3b9
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Thu Sep 13 11:27:44 2012 -0400

    assistant: fix wrong background color for highlighted heading

 themes/Adwaita/gtk-3.0/gtk-widgets.css |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/themes/Adwaita/gtk-3.0/gtk-widgets.css b/themes/Adwaita/gtk-3.0/gtk-widgets.css
index d8f065a..3809e8c 100644
--- a/themes/Adwaita/gtk-3.0/gtk-widgets.css
+++ b/themes/Adwaita/gtk-3.0/gtk-widgets.css
@@ -2593,6 +2593,7 @@ GtkOverlay.osd {
  * GtkAssistant *
  ****************/
 GtkAssistant .sidebar .highlight {
+    background-color: transparent;
     color: @theme_fg_color;
     font: bold;
 }