Fix bug 6408 (nautilus_view_report_load_failed causes Nautilus to
	segfault in an idle callback):

	* libnautilus/nautilus-idle-queue.c: (execute_queued_functions),
	(nautilus_idle_queue_destroy): Changed the idle queue so it can
	handle being destroyed while inside one of the queued functions.

	Fix bug 6402 (Click desktop icon -> Nautilus window not moved to
	front):

	* src/nautilus-window-manage-views.c: (open_location): Bring the
	existing window up when it's reused in the "open icon on desktop"
	in single-window mode.

	Other changes:

	* libnautilus-extensions/nautilus-icon-factory.c:
	(is_theme_in_user_directory): Rename from "check_local_theme"
	and changed it to use a normal function result instead of taking
	a gboolean pointer.
	(set_theme): Use new function and booleans by their new names.
	"in_user_directory" instead of "local".
	(make_full_icon_path): Just the name change.
	(get_themed_icon_file_path): Take a boolean parameter instead of
	try...