Not all Admin subclasses use get_field_queryset here, so we will use it explicitly

def formfield_for_manytomany(self, db_field, request, **kwargs):
        '''
        Not all Admin subclasses use get_field_queryset here, so we will use it explicitly
        '''
        db = kwargs.get('using')
        kwargs['queryset'] = kwargs.get('queryset', self.get_field_queryset(db, db_field, request))
        return super(AccessControlMixin, self).formfield_for_manytomany(db_field, request, **kwargs)