v2.2

Revise P25 receiver status and update date

Updated the status of the P25 receiver and modified the date.

v2.1

P25 is the part that has had the most testing and is the most reliable. FM, POCSAG and ADS-B all work but are still very much a work in progress.

Squelch is on the FM page now, with an open or muted readout, adjusted with up and down.

The head warns you when the SDR drops out or goes quiet, and the radio power cycles the dongle on its own to bring it back.

Receive flash is a proper screen inversion now instead of a single frame.

Needs the matching LakeShark firmware on the radio side.