2008-05-20  Sven Neumann  <sven@gimp.org>

	* app/widgets/Makefile.am
	* app/widgets/gimptoggleaction.[ch]
	* app/widgets/gimpradioaction.[ch]: added new action types derived
	from GtkToggleAction and GtkRadioAction. These types override the
	"connect_proxy" method to enable tooltips in menus.

	* app/widgets/gimpactiongroup.c: use the new action types.

	* app/actions/dockable-actions.c: added a tooltip for the
	"dockable-lock-tab" action.

svn path=/trunk/; revision=25717