[gnome-tweak-tool] fix: sidebar color

[John Stowers <jstowers src gnome org>]

commit a57b45b50e04f4965cbecec708659420a4197e38
Author: Alex Muñoz <alexmudoz gmail com>
Date:   Mon Sep 9 03:39:22 2013 -0300

    fix: sidebar color

 data/shell.css |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/shell.css b/data/shell.css
index 08f8422..1352fdf 100644
--- a/data/shell.css
+++ b/data/shell.css
@@ -1,6 +1,6 @@
 /* the sidebar */
 .tweak-categories {
-    background-color: #ebedeb;
+    background-color: shade(@theme_bg_color, 0.99)
 }
 .tweak-category {
     padding: 10px;