Support up to four last received callsigns instead of a single one
Auto-age off last received callsigns after five minutes
This is a breaking change. Existing actions that use the old "Show last received callsign" checkbox will need to be configured again using the slider instead.
Fixes #235
This is a breaking change. Existing actions that use the old "Show last received callsign" checkbox will need to be configured again using the slider instead.