Wed Jul 10 16:50:27 2002  George Lebl <jirka@5z.com>

	* button-widget.[ch], launcher.c, logout.c, darawer.c, menu.c,
	  panel-util.h: redo the icon loading logic a bit and leave more
	  logic up to the loading code in button_widget.  Failsafe code so
	  that we always succeed even if we can't find gnome-unknown.png,
	  in which case we make a white rectangle with a red X thorough it.