[gnome-builder] theme: fix styling on sidebar in preferences

[Christian Hergert <chergert src gnome org>]

commit 9c3dc22e494a6aa320882c829de85bd4eb217055
Author: Christian Hergert <chergert redhat com>
Date:   Sun Feb 14 20:56:09 2016 -0800

    theme: fix styling on sidebar in preferences

 data/theme/Adwaita-shared.css |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/data/theme/Adwaita-shared.css b/data/theme/Adwaita-shared.css
index 4519999..1878b6b 100644
--- a/data/theme/Adwaita-shared.css
+++ b/data/theme/Adwaita-shared.css
@@ -71,6 +71,9 @@ omnisearchdisplay omnisearchgroup omnisearchrow:selected {
  * preferences perspective, including groups, rows,
  * sidebar, etc.
  */
+workbench preferences stacksidebar list {
+  border-right: 1px solid alpha(@borders, 0.4);
+}
 workbench preferences preferencesgroup list row {
   padding: 10px;
   border-bottom: 1px solid alpha(@borders, 0.2);