Gotify-tray

- the applications list can now be ordered alphabetically
- fix incorrect out of focus colors on some desktop environments
- write a settings value only if it has been changed
- add option to disable the server watchdog thread
- remove websocket-client dependency in favor of QWebSocket
- remove python-dateutil dependency in favor of QDateTime
- fpm is now used to build deb/pacman/etc packages -- installs to /opt/gotify-tray/

Commits
- 81c7e0a: pip package: make sure the proper package versions are used (dries.k)
- a7f5534: in addition to aborting the task, also disconnect from the message signal (dries.k)
- 4eceae5: use QCoreApplication.instance instead of passing the instance through several objects (dries.k)
- b2718ac: disable MainWindow buttons while messages are being inserted (dries.k)
- c57e3d5: Follow the system theme and set the icons accordingly, no more handcrafted theming (dries.k)
- c1323fe: set message priority color in stylesheet (dries.k)
- ad5797b: do not set the tray icon color on low priority messages (dries.k)
- 10d1d7b: don't recompute the index (dries.k)
- 7ed6eb0: user parent() method (dries.k)
- f91e9b9: update pyqt (dries.k)
- 1862ed4: v0.5.1 (dries.k)

- Automatic theme based on system theme
- Add option to set date label as system locale format
- 5dd9c54: set minimum size hint for short messages (Imran Shah) [30](https://github.com/seird/gotify-tray/pull/30)
- Fix mixing of messages when changing applications too quickly
- Update requirements
- Bump minimum python version to 3.10
- Simplify the inserting and processing of messages
- Update type hinting
- Try to improve readability

Commits
- cc64156: update workflow (dries.k)
- 072eb27: increase contrast between message widget and background in dark theme (dries.k)
- 558ec0d: rename orange/red to medium/high (dries.k)
- d71b053: dark theme: add border around qcheckbox (dries.k)
- b3692a3: fix refresh halting when deleting a message (dries.k)
- 3199a29: update readme (dries.k)
- 826cef9: set focus when verifying server info (dries.k)
- bcc9a12: update dependencies (dries.k)
- 34d81ef: v0.4.2 (dries.k)

Commits
- a9aac24: clear the cache after deleting *all* messages (dries.k)
- e00c2d4: display message priority colors (dries.k)
- 2de6077: v0.4.1 (dries.k)

- improve responsiveness when changing applications
- Render images
- ui fixes
- add option to clear the image cache