sorted by search criteria). We're still not sure if this is a
	good UI, but I'll make it possible for us to try it out if it
	isn't too much more work.

	* src/file-manager/fm-directory-view.c: Added a FIXME comment

	* src/file-manager/fm-list-view.h: Added get_default_sort_attribute
	function pointer.
	* src/file-manager/fm-list-view.c:
	(fm_list_view_initialize_class): Wired up default_sort_attribute
	function pointer.
	(fm_list_view_begin_loading): use get_default_sort_attribute ()
	instead of string constant.
	(get_default_sort_attribute): Dispatch to possibly overridden
	function pointer.
	(real_get_default_sort_attribute): return "name" (dupe, actually)

	* src/file-manager/fm-search-list-view.c:
	(fm_search_list_view_initialize_class): Wired up
	get_default_sort_attribute function pointer
	(real_get_default_sort_attribute): return "name" (dupe, actually).
	This gives us the place to decide which attribute to start out
	sorted by. To choose the attribute, we need to define a mapping
	between the search URI and one of the column attributes. I'm
	waiting on this part until mathieu gets farther along with the
	search-URI-to-human-readable-string code, which I hope to
	leverage.