A bar that GNOME applications put on the bottom of the windows to
display status, progress, hints for menu items or a minibuffer for
getting some sort of response. It has a stack for status messages
Gnome.Appbar( 1, 1, Gnome.PreferencesUser )->set_progress( 0.4 );
Signals:
clear_prompt
Emitted when the prompt is cleared
user_response
Emitted when the user hits enter after a prompt
Gnome.AppProgressKey()->set()