[gnome-builder] style: fix pane separators

[Christian Hergert <chergert src gnome org>]

commit 34b2963094e2dc22e3598b2cbbd3a819af71708b
Author: Christian Hergert <christian hergert me>
Date:   Fri Jan 15 10:25:59 2016 -0800

    style: fix pane separators

 data/theme/Adwaita-shared.css |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/data/theme/Adwaita-shared.css b/data/theme/Adwaita-shared.css
index 7af75b5..fc5eb3c 100644
--- a/data/theme/Adwaita-shared.css
+++ b/data/theme/Adwaita-shared.css
@@ -186,6 +186,10 @@ layouttab > box > button:last-child:backdrop image {
 /*
  * The following tweaks the layout panel headers
  */
+layoutpane {
+  -IdeLayoutPane-handle-size: 1;
+  -gtk-icon-source: none;
+}
 layoutpane stackswitcher button {
   min-width: 0;
   border: none;
@@ -194,6 +198,9 @@ layoutpane stackswitcher button {
   padding: 0 3px 0 3px;
   border-radius: 0;
 }
+layoutpane .pane-separator {
+  background-color: @borders;
+}
 
 
 /*