Fixed bug 5863 (visiting a directory makes its property-window
	deep count start again from scratch)

	* libnautilus-extensions/nautilus-directory-async.c:
	(nautilus_directory_invalidate_count_and_mime_list):
	Renamed from _invalidate_counts, no longer resets the
	deep count when resetting the shallow count and MIME
	list. (There's already a separately-used API for resetting
	the deep count.)
	(nautilus_directory_force_reload):
	* libnautilus-extensions/nautilus-directory-private.h:
	* libnautilus-extensions/nautilus-directory.c:
	(invalidate_one_count), (invalidate_count_and_unref):
	Updated for name change.