Fix minor bugs

api.v1.yaml

@@ -766,7 +766,8 @@ components:
             $ref: '#/components/schemas/tag'
         is_on:
           type: boolean
-          description: NULL when unknown
+          nullable: true
+          description: NULL when unknown (usually because controller is not connected)
     schedule-untagged:
       title: schedule
       type: object

src/app_state.rs

@@ -128,6 +128,7 @@ impl Handler<DisconnectController> for AppState {
 			//block_on(address.send(ControllerWsAction::Disconnect))??;
 			address.do_send(ControllerWsAction::Disconnect);
 		}
+		self.notify_relay_clients();
 		Ok(())
 	}
 }