This method will connect each accel_path from the GtkActionEntry in action_entries to its related callback.
If the accelerator is pressed, the related callback will be called.
| accel_group |
the AccelGroup to connect to |
| action_entries |
array of action_entries to be added |
| n_action_entries |
size of the action_entries array |
| callback_data |
data which should be passed to the callback of each GtkActionEntry |