How to reproduce:
- Start MITK
- Open Moviemaker
- Load image
- Select window for recording "3" and leve window for stepping alone (thus "1")
- Hit "Write Screenshot"
What happens?
A screenshot is written to file, but it is a screenshot of window 1 instead of three (the stepping window) and the background is white instead of black (in the file as well as in MITK afterwards (until window is refreshed, then it returns back to normal)