[dconf-editor] Correct 'remove bookmark' buttons.

[Arnaud Bonatti <arnaudb src gnome org>]

commit 5513297a140d626ac5e816112f6f4b2131d21af6
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Tue Jan 5 18:22:22 2016 +0100

    Correct 'remove bookmark' buttons.

 editor/bookmark.ui |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/editor/bookmark.ui b/editor/bookmark.ui
index d41c7ea..09b0601 100644
--- a/editor/bookmark.ui
+++ b/editor/bookmark.ui
@@ -20,7 +20,8 @@
         <property name="margin">2</property>
         <style>
           <class name="image-button"/>
-          <class name="sidebar-button"/>
+          <class name="circular"/>
+          <class name="flat"/>
         </style>
         <child internal-child="accessible">
           <object class="AtkObject">