3.9.16 (unstable): Gtk: * Added HeaderBar. (Juan Rafael García Blanco) Bug #708194 * Added ListBox and ListBoxRow, (Kjell Ahlstedt) Bug #708115 * Added PlacesSidebar. (Juan Rafael García Blanco) Bug #705642 * Added Stack and StackSwitcher, (Andrew Potter) Bug #704964 * Widget: * Make insert_action_group() public. (Murray Cumming) * Add remove_action_group() (Murray Cumming)