[gnome-builder] prefs: use a frame around chooser

[Christian Hergert <chergert src gnome org>]

commit 05a062d78e210767980dee1e51abfe0ab22f5d1c
Author: Christian Hergert <chergert redhat com>
Date:   Fri Oct 30 20:03:25 2015 -0700

    prefs: use a frame around chooser
    
    This was looking a bit odd without a frame, so adding one back.

 data/ui/gb-preferences-page-theme.ui |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/data/ui/gb-preferences-page-theme.ui b/data/ui/gb-preferences-page-theme.ui
index 7f879e2..05071e4 100644
--- a/data/ui/gb-preferences-page-theme.ui
+++ b/data/ui/gb-preferences-page-theme.ui
@@ -34,9 +34,14 @@
               </object>
             </child>
             <child>
-              <object class="GtkSourceStyleSchemeChooserWidget" id="style_scheme_widget">
+              <object class="GtkFrame">
                 <property name="margin-top">6</property>
                 <property name="visible">true</property>
+                <child>
+                  <object class="GtkSourceStyleSchemeChooserWidget" id="style_scheme_widget">
+                    <property name="visible">true</property>
+                  </object>
+                </child>
               </object>
             </child>
           </object>