Freezed graphics when moving a windowed game

@dreamora - gadgetpaint sounds like maxgui (like I mentioned I'm not using it). If you think of the "repaint"-appeareance instead of just an dotted-rectangle on the old position of the window - it just repaints the image it has stored when dragging started

@Fabian - I'll have a look at your code tomorrow. At the moment I'm optimizing the maximum framerates (drawtext can be very time consuming and so on). After finishing those parts I'll try your code.


Thanks for your engagement also on weekends.

bye MB