fixed bug 5198, removing an active sidebar panel messes up the
	remaining ones . I had already fixed this but missed the case
	when multiple windows were open. Fixed by adding a sidebar call to
	close the active panel if it matches a passed-in id, and used that in
	nautilus window to close the panel if necessary before destroying it.

	* src/nautilus-sidebar.c:
	(nautilus_sidebar_hide_active_panel_if_matches),
	(toggle_sidebar_panel):
	added routine to close the active panel if it matches a passed-in
	id.
	* src/nautilus-sidebar.h:
	added above mentioned routine

	* src/nautilus-window-manage-views.c: (handle_view_failure),
	(nautilus_window_set_sidebar_panels):
	close the active panel if necessary before destroying it.