Set the #GtkAccelGroup which holds global accelerators for the
menu. This accelerator group needs to also be added to all windows
that this menu is being used in with gtk_window_add_accel_group(),
in order for those windows to support all the accelerators
contained in this group.
Set the #GtkAccelGroup which holds global accelerators for the menu. This accelerator group needs to also be added to all windows that this menu is being used in with gtk_window_add_accel_group(), in order for those windows to support all the accelerators contained in this group.