Minor update to the zap code. Now after zapping a room, if you double

Minor update to the zap code.  Now after zapping a room, if you double
click on the zapped rooms folder it'll update the rooms within it.  In
other words if you zap a room, then click on it within the zapped rooms
folder it'll unzap, but the room tree won't update unless you double click
the zapped rooms folder.