* src/nautilus-theme-selector.c:
	(nautilus_theme_selector_initialize), (remove_button_callback),
	(exit_remove_mode):
	fixed bug 5972, remove theme button uses aa text, by using
	a gtk_label instead of a nautilus_label.  Also, hide the
	add button during remove mode so it's less confusing.

	* libnautilus-extensions/nautilus-theme.c:
	(nautilus_theme_make_selector):
	fixed a crash when an installed theme lacked a preview icon,
	cleaned up code and fixed a memory leak.