Fixed bug 2233 (proper icon not selected switching views after
	rename) by re-sending selection when the selection items change
	since they might have changed names.

	* src/file-manager/fm-directory-view.c: (done_loading): Moved
	more of the done_loading code here for clarity.
	(compare_pointers), (sort_and_check_for_intersection): Added
	functions that quickly find if there's an intersection in two
	GLists of NautilusFile objects.
	(display_pending_files): Move some of the done_loading code into a
	new function, do it after processing file changes, and add code to
	send out the selection if a file change comes in for any items in
	the selection (in case the name changed).
	(display_selection_info_idle_callback),
	(update_menus_idle_callback), (display_pending_idle_callback):
	Make all of these more robust by keeping the NautilusView object
	in a local variable.
	(display_pending_timeout_callback): Do the "ref the NautilusView"
	thing in this function too...