Finds the first accelerator in @accel_group that matches @accel_key and @accel_mods, and activates it.
the quark for the accelerator name
the #GObject, usually a #GtkWindow, on which to activate the accelerator
accelerator keyval from a key event
keyboard state mask from a key event
%TRUE if an accelerator was activated and handled this keypress
See Implementation
Finds the first accelerator in @accel_group that matches @accel_key and @accel_mods, and activates it.