***************** AirScout Requirements **************************

- GreatCircle, distance and locator layer on map (DJ5AR)
- Snooze button for alarm on main window, clickable in PLAY mode ()
- Calculate Doppler

* watch list
- Add/remove call sign from Multi View tab over UDP command
- add stations to watchlist based on DXCC, Loc, QTF range from QTF1 to QTF2