Steps to reproduce:

1. Run the HelloFullscreenToggle program:

    java -cp apps/toys/Hello/dist/Hello.jar hello.HelloFullscreenToggle

2. Press the "Toggle Fullscreen" button to entire full screen

3. Exit full screen, either using the ESC key or by pressing the "Toggle Fullscreen" button again.

BUG: the window position is not restored, but moves to the upper left of the screen.

This worked in last week's build so it is a recent regression.