[Feature] Close to tray

**Describe the solution you'd like**
I think it would be great if we had an option to "close" the application to the system tray.
**Describe alternatives you've considered**
Alternatively it must stay open/minimized, which is not great because it's nice to "hide" it in the tray if you don't need it currently.
**Additional context**
I think the feature is pretty straightforward, not sure how big the scope is since it's a cross-platform project