Same thing here.  Overriding this method at all shouldn't be necessary (except for the importer/excel hack) because it's already handled by https://github.com/dimagi/commcare-hq/blob/3d6307286cab72502a56148229cdabab2f52fa10/corehq/apps/hqwebapp/models.py#L137.  If it's not then we need to make it work within the base class's is_active method.