* src/nautilus-window-manage-views.c: (change_state_at_idle),
	(load_underway_callback):
	fixed bug 5657, crash during menu update when switching views.  This is
	also behind several other reported bugs.  Fixed it as Darin suggested,
	which is to defer the window state change associated with loading
	a new component until idle time, so it doesn't wreak havoc
	by interrupting other idle routines.

	* components/throbber/nautilus-throbber.c:
	(nautilus_throbber_initialize_class), (get_bonobo_properties),
	(set_bonobo_properties), (nautilus_throbber_destroy),
	(nautilus_throbber_initialize),
	(nautilus_throbber_button_press_event):
	added a location property and made it issue a notification when the
	throbber is clicked on.  Also, removed the no longer used
	"location_changed" signal and better memory management of the
	property bag.

	* src/nautilus-window.c: (throbber_location_changed_callback),
	(nautilus_window_constructed), (nautilus_window_destroy):
	make clicking on the throbber work by adding a listener for
	the throbber location property and changing the location
	accordingly when the event is posted.  Also, fixed a leak
	of the bonobo object.

	* src/nautilus-window-private.h:
	added a field to hold the event source listener ID.