[gnome-chess] Partially revert "remove unnecessary size groups"

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 4812c81815d8e7f5e5a79cddfe63230748fefda0
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Mon Mar 24 19:44:17 2014 -0500

    Partially revert "remove unnecessary size groups"
    
    The header bar size group was actually important: it was keeping the New
    Game button at the proper height. And since it wasn't causing any
    problems, let's just put it back.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=726951

 data/gnome-chess.ui |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/data/gnome-chess.ui b/data/gnome-chess.ui
index efd197f..7762cac 100644
--- a/data/gnome-chess.ui
+++ b/data/gnome-chess.ui
@@ -344,4 +344,15 @@
       </object>
     </child>
   </object>
+  <object class="GtkSizeGroup" id="header_bar_buttons_sizegroup">
+    <property name="mode">vertical</property>
+    <widgets>
+      <widget name="new_game_button"/>
+      <widget name="undo_move_button"/>
+      <widget name="pause_button"/>
+      <widget name="gear_button"/>
+      <widget name="save_game_button"/>
+      <widget name="open_game_button"/>
+    </widgets>
+  </object>
 </interface>