Adds an indication for the number of available messages to the response to the MSGS? query, HB response, and message response in addition to the ID of the next available message.
Changing NEXT MSG ID logic to send first available ID instead of next in list when sending messages
rename remaining files that didn't match their class definitions
relocate the explicit UI_Constructor member function to JS8_MainWindow
relocate the processBufferedActivity member function to JS8_MainWindow
format affected files with LLVM clang-format
Set default APRS inbound relay to off
Fix layout of General->Networking & Autoreply tab in Settings