now that the bonobo problems are resolved, we can go back to
	the componentized throbber.

	* src/Makefile.am:
	* src/nautilus-window-toolbars.c:
	(nautilus_window_initialize_toolbars):
	* src/nautilus-window.c: (throbber_location_changed_callback),
	(nautilus_window_constructed), (nautilus_window_destroy),
	(nautilus_window_allow_stop):
	* src/nautilus-window.h: