3.12.0 (stable): * Application: Add set_accels_for_action(), deprecating add_accelerator(). (Murray Cumming) * Button: Add set_image_from_icon_name() with a use_fallback argument. (Kjell Ahlstedt) * demo: - Add the FlowBox demo part. (Juan R. Garcia Blanco, Murray Cumming) - Add HeaderBar demo. (Juan R. Garcia Blanco)