re-swallow bg_object after wallpaper transition has completed
re-swallow bg_object after wallpaper transition has completed

fixes eventing/stacking on bg object

rvandegrift/e,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,rvandegrift/e,tasn/enlightenment,tizenorg/platform.upstream.enlightenment,tasn/enlightenment