Fix web instance log following lost on reconnect

Fix the console view of the instance web interface losing the output
subscription after a reconnect to the master server due to not
re-subscribing to the outputs.

packages/web_ui/src/util/websocket.jsx

@@ -49,6 +49,10 @@ export class Control extends libLink.Link {
 		}
 
 		this.instanceOutputHandlers = new Map();
+
+		this.connector.on("connect", () => {
+			this.updateInstanceOutputSubscriptions().catch(console.error);
+		});
 	}
 
 	async instanceOutputEventHandler(message) {