FEAT #9349 User isDeletable

modules/entities/class/EntityControler.php

rest/index.php

src/app/entity/controllers/ListInstanceController.php

src/app/entity/controllers/ListTemplateController.php

src/app/entity/models/EntityModelAbstract.php

src/app/entity/models/ListInstanceModelAbstract.php

src/app/user/controllers/UserController.php