[v3] How to update the menu label in real time when the tray is open?

[learning-go123]

Calling menu.Update() doesn't re-render the UI in real time. It only changes when I reopen the System Tray menu. I'm not sure if this is due to my incorrect usage.

	app := application.New(application.Options{
		Name:        "Systray Demo",
		Description: "A demo of the Systray API",
	})

	systemTray := app.SystemTray.New()
	if runtime.GOOS == "darwin" {
		systemTray.SetTemplateIcon(icons.SystrayMacTemplate)
	}
	myMenu := app.NewMenu()
	loading := myMenu.Add("loading...")
	systemTray.SetMenu(myMenu)

	go func() {
		for i := 0; i <= 100; i++ {
			time.Sleep(1 * time.Second)
			loading.SetLabel("Loading " + strconv.Itoa(i))
			myMenu.Update()
		}
	}()

	err := app.Run()
	if err != nil {
		log.Fatal(err)
	}