Previous change (simplyfy DMR status display) did not consider
DMR duplex mode.
Now DMR simplex mode uses 2-lines style, duplex mode 4-lines like this.
Listening
TS1
N Callsign
TS2 TGxx
For this change, statusLine() no longer have meaning.
It will be removed in the future.
HobbyTronics TFT Shield has discontinued, here is a replacement TFT module
that can be controlled from UART.
Different from TFT Shield, it cannot display figures that stored in
micro SD card. So appearance is simplified like OLED.
Surenoo module sometimes ignores display commands (in busy stuation?),
this driver buffers display status and refresh at clockInt().