[banshee] ThickClient: Fix Source toolbar buttons hidden at first (bgo#645987)

[Gabriel Burt <gburt src gnome org>]

commit ad152e22af5a8e3e8ed7a378e2571bcb55186add
Author: Gabriel Burt <gabriel burt gmail com>
Date:   Tue Mar 29 16:54:29 2011 -0500

    ThickClient: Fix Source toolbar buttons hidden at first (bgo#645987)
    
    Apparently a call to UIManager.EnsureUpdate is now needed.

 .../Banshee.Gui/InterfaceActionService.cs          |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/Core/Banshee.ThickClient/Banshee.Gui/InterfaceActionService.cs b/src/Core/Banshee.ThickClient/Banshee.Gui/InterfaceActionService.cs
index bde46f8..db16677 100644
--- a/src/Core/Banshee.ThickClient/Banshee.Gui/InterfaceActionService.cs
+++ b/src/Core/Banshee.ThickClient/Banshee.Gui/InterfaceActionService.cs
@@ -114,6 +114,8 @@ namespace Banshee.Gui
             if (ui_str != null) {
                 active_source_uis.Add (UIManager.AddUiFromString (ui_str));
             }
+
+            UIManager.EnsureUpdate ();
         }
 
         private void OnExtensionChanged (object o, ExtensionNodeEventArgs args)