Feature release:
- Added support for AnyTone AT-D878UVE.
- Removed Ctrl+U/Ctrl+D shortcuts to avoid accidental upload/download.
- Fixed config writer for GPS/APRS settings.
- Fixed config reader for GPS/APRS settings.
- Fixed RD-5R upload.
- Fixed general settings encoding for AnyTone AT-D878UV according to @reald reverse engineering.
- Fixed scan list decoding for AnyTone AT-D878UV.
- Added frequency limits for all radios.
- Set 'amateur mode' for AT-D878UV by default. Enables all menu items.
- Fixed codeplug decoding for UV390/RT3S, especially for non-GPS radios.