- split objet group add/link into 2 operators

- link now brings up a search box so when there are 100's of groups its less annoying.
- utility functions for id-enums so only local objects can be displayed in a search list (used for group_link)
- renamed operator properties from typle to scene, group, action etc.

release/scripts/ui/properties_object.py

@@ -155,13 +155,11 @@ class OBJECT_PT_groups(ObjectButtonsPanel):
         ob = context.object
         wide_ui = context.region.width > narrowui
 
-        if wide_ui:
-            split = layout.split()
-            split.operator_menu_enum("object.group_add", "group")
-            split.label()
-        else:
-            layout.operator_menu_enum("object.group_add", "group")
+        split = layout.split(percentage=0.8, align=True)
+        split.operator("object.group_link", text="Link to Group")
+        split.operator("object.group_add", text="", icon='ZOOMIN')
 
+        # XXX, this is bad practice, yes, I wrote it :( - campbell
         index = 0
         value = str(tuple(context.scene.cursor_location))
         for group in bpy.data.groups: