message: Fix extension closed telemetry event
diff: @@ -218,9 +218,11 @@ export class Controller {
  }
  static dispose() {
  + if(this._instance){
  Controller.Telemetry.trackCustomEvent(TelemetryEventName.ExtensionClosed, {
  - syncCompleted: this._instance?.SyncCompleted.toString()
  + syncCompleted: this._instance.SyncCompleted.toString()
  });
  + }
  CoreTemplateStudio.DestroyInstance();
  this._instance = undefined;
  }
  