Ensure all combo boxes always have an item selected.

2009-04-03  Jonathan Matthew  <jonathan@d14n.org>

	* widgets/rb-query-creator-properties.c:
	(create_time_unit_option_menu):
	* widgets/rb-query-creator.c: (rb_query_creator_constructor),
	(setup_sort_option_menu):
	Ensure all combo boxes always have an item selected.

svn path=/trunk/; revision=6270