Changes:
- Added MPRIS support
- Added repeat modes: single video, whole playlist and shuffle
- Support opening folders with media files
- Append playlist items by holding Ctrl while doing Drag and Drop
- Improved handling of keyboard shortcuts
- Added more keyboard shortcuts
- Added window that shows available keyboard shortcuts
- Show black screen by default after playback (make showing last frame optional instead)
- Added ability to export playlist to file
- Improve handling of changing displays with different resolutions
- Added support for EGL under x11 with GTK 4.3.1 or later
- Added missing symbolic app icon (thanks to @SeaDve)
- Some misc bug fixes and code cleanups