bug(tray): tray icon dissapearing when closing window

[Baloe2000]

Thanks for the great work for the new update! In the recent mayor version 22.0+ I have noticed the following behaviour:

1. At startup the app starts correctly in the background with a tray icon visible.
2. When having opened the app window, and closing it, it takes the tray icon with it.

I am not sure if it was a specific toggle before or if it just worked. But I guess there should be an option for the app to "minimize to tray" or "close to tray" when closing or something similar.

Personally I am on linux mint 22.3. Happy to provide any further details. Please let me know!

[f-koehler]

Thanks for the kind word! Yes, I definitely broke that in the last update, sorry about that. Will fix it in the next point release!