Final changes to kill off the legendary bug 3579
	(Convert directory view context menus to use Bonobo)

	* libnautilus/nautilus-bonobo-ui.h:
	#define for zoom items placeholder in popup. Remove
	#defines for popup-specific zooming commands, since now
	we don't need distinct popup-specific ones.

	* libnautilus-extensions/nautilus-bonobo-extensions.h:
	* libnautilus-extensions/nautilus-bonobo-extensions.c:
	(nautilus_bonobo_set_label_for_menu_item_and_command):
	Moved this here and commented; it had been a private
	function in fm-directory-view.c.

	* src/file-manager/fm-directory-view.c:
	(real_merge_menus): Just hide the placeholder for the zoom items,
	which is now sufficient due to a Bonobo fix Darin made.
	(real_update_menus): Update for API name change.
	(set_label_for_menu_and_command): Moved this to another file
	and renamed it.
	* src/file-manager/fm-icon-view.c:
	(fm_icon_view_update_menus): Update the dynamic menu items
	in-line here, as was done with fm-directory-view.c in an earlier
	checkin.
	(compute_menu_item_info), (update_one_menu_item): Removed these
	obsolete functions.
	* src/nautilus-shell-ui.xml: Eliminated special pop-up versions of
	zoom commands. They existed only to allow hiding without affecting
	the menu-bar versions, but now that placeholders can be hidden
	these aren't necessary.
	* src/nautilus-window-menus.c: (nautilus_window_initialize_menus):
	Removed verb installation for pop-up versions of zoom commands.