delegate_mouse_event

FYI I am currently changing another aspect of delegate mouse event, i 
want to let it return the widget to which the event is actually 
dispatched, so that i can determinate the hover widget etc correctly 
without resorting to hacks like hover_ptr->contains... which are 
currently broken. If noone objects i'll change the return value and 
handle the hover widget stuff with the return value from delegate mouse 
event. This seems like a neat solution to me :)
As always, any feedback is greatly appreciated *g*