GtkMenuShell::activate_item
void activate_item(
GtkWidget menu_item
, bool force_deactivate);
activate_item() is used to
emit the "activate"
signal from the GtkMenuItem passed as the first
argument. This has the same effect as a user clicking on an item or
pressing the Enter key while that item is selected.
If the second parameter is set to true, the
deactivate() method is called
on the menu that the GtkMenuItem is a part of,
taking the menu down. If set to false, the menu
item is hidden on activation.
