[gnome-chess] Use headerbar in the preferences dialog

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 621308e1b8f5a7a16b832f0fb70c74fca3ad8bb1
Author: Yosef Or Boczko <yoseforb src gnome org>
Date:   Wed Mar 26 00:27:13 2014 +0200

    Use headerbar in the preferences dialog
    
    https://bugzilla.gnome.org/show_bug.cgi?id=727056

 data/preferences.ui |   31 +------------------------------
 1 files changed, 1 insertions(+), 30 deletions(-)
---
diff --git a/data/preferences.ui b/data/preferences.ui
index 9169c0f..f72dca7 100644
--- a/data/preferences.ui
+++ b/data/preferences.ui
@@ -180,39 +180,13 @@
     <property name="resizable">False</property>
     <property name="destroy_with_parent">True</property>
     <property name="type_hint">dialog</property>
+    <property name="use_header_bar">1</property>
     <signal name="delete-event" handler="preferences_delete_event_cb" swapped="no"/>
     <signal name="response" handler="preferences_response_cb" swapped="no"/>
     <child internal-child="vbox">
       <object class="GtkBox" id="dialog-vbox1">
         <property name="visible">True</property>
         <property name="can_focus">False</property>
-        <child internal-child="action_area">
-          <object class="GtkButtonBox" id="dialog-action_area1">
-            <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <property name="layout_style">end</property>
-            <child>
-              <object class="GtkButton" id="closebutton1">
-                <property name="label" translatable="yes">Close</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="can_default">True</property>
-                <property name="receives_default">False</property>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">False</property>
-                <property name="position">0</property>
-              </packing>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="pack_type">end</property>
-            <property name="position">0</property>
-          </packing>
-        </child>
         <child>
           <object class="GtkNotebook" id="notebook1">
             <property name="visible">True</property>
@@ -713,9 +687,6 @@
         </child>
       </object>
     </child>
-    <action-widgets>
-      <action-widget response="-7">closebutton1</action-widget>
-    </action-widgets>
   </object>
   <object class="GtkListStore" id="side_model">
     <columns>