* src/file-manager/fm-directory-view.h,
	* src/file-manager/fm-directory-view.c: (compute_menu_item_info),
	(fm_directory_view_real_create_selection_context_menu_items),
	(insert_bonobo_menu_item), (fm_directory_view_real_merge_menus),
	(fm_directory_view_real_update_menus),
	(fm_directory_view_get_context_menu_index): Some more menu code
	cleanup. Renamed FM_DIRECTORY_VIEW_MENU_PATH_SET_PROPERTIES
	to _SHOW_PROPERTIES to match menu text; made new function
	insert_bonobo_menu_item that calls compute_menu_item_info
	to get name & sensitivity so that _real_merge_menus
	doesn't have a separate and potentially diverging copy of
	menu item names.