Changelog:
- Fixed some crashes that could be triggered by invalid SGF files.
- Callisto: selected piece was wrongly rendered as one-piece in some situations if partially outside board.
- Fixed Leave Fullscreen button positioning if multiple screens exist.
- Window close button did not work in message dialogs with detailed
text.
- Ctrl-W now closes application.
- Use reverse-domain file names for appstream and desktop file.
- Removed no longer needed workaround for disabling appstreamtest added by KDECMakeSettings.