reviewed by: John Sullivan <sullivan@eazel.com>

	* src/nautilus-window-menus.c:
	(nautilus_window_bookmarks_preference_changed_callback),
	(nautilus_window_initialize_bookmarks_menu):
	* src/nautilus-window-private.h:
	* src/nautilus-window.c: (nautilus_window_destroy):
	Added a preference remove callback - which fixes bug 5147.