screen reload flickering

[rjahn]

Maybe the same problem as described here.

If we use VisionX, create an application and use react UI as Live Preview. If we change the screen in VisionX, the client receives a push notification and re-opens the screen. This flickrs.
Everything is working as expected because the screen shows all changes, but flickering is not a cool thing.

It works in vaadin UI without flickering, so I guess we can improve our reactUI as well.

[rjahn]

#527 (comment)