Refactor the bundle registry. Move it inside

the shell and expose the parts that should be
public to the shell dbus service.

shell/view/frame/ActivitiesBox.py

@@ -20,9 +20,10 @@ import logging
 from sugar.graphics import units
 from sugar.graphics.xocolor import XoColor
 from sugar.graphics.iconbutton import IconButton
-from sugar.activity import bundleregistry
 from sugar import profile
 
+from model import bundleregistry
+
 class ActivityButton(IconButton):
     def __init__(self, activity, popup_context):
         IconButton.__init__(self, icon_name=activity.get_icon(),