Separate sensitive/selectable properties.

Separate sensitive/selectable properties.

2006-06-02  Kristian Rietveld  <kris@imendio.com>

	Separate sensitive/selectable properties.

	* gtk/gtktreeselection.c (tree_column_is_sensitive): remove,
	(_gtk_tree_selection_row_is_selectable): remove checks to see if at
	least one column is sensitive,
	(gtk_tree_selection_real_select_node): remove code which enables
	insensitive rows to always be unselected.

	* gtk/gtktreeview.c (gtk_tree_view_row_changed): remove code
	that unselects a node if it just became insensitive.

	* gtk/gtkcombobox.c (gtkcombo_box_list_select_func): new function,
	based on the at least one column sensitive check from
	_gtk_tree_selection_row_is_selectable(),
	(gtk_combo_box_list_setup): set selection function on tree selection.