should mention "theme" in its name)

	* src/nautilus-shell-ui.xml: After bugzilla discussion
	with Vera, renamed "Change Appearance..." -> "Nautilus Themes..."

	* libnautilus-extensions/nautilus-stock-dialogs.c:
	Reduced timed-wait initial timeout from 5 seconds to
	3 after playing around with the gnome-vfs test-method.