Fullscreen window redraws itself after device rotation from landscape to portrait mode, and pressing "Close" button.
Not a regression, occurs in 2.0.2 as well.
Steps to reproduce:
1. Run KitchenSink-Nook in landscape
2. Go to Base UI - Window (Standalone)
3. Press "Open (Fullscreen)" button
4. Rotate device to portrait mode
Fullscreen window redraws itself
Fullscreen window shouldn't redraw itself