Added coaxswitch via GPIO0 (XDRGTK)

Optimised XDRGTK parsing
Fix problem where PS/PTY/PI sometimes turned blue on correct RDS when switching from Adv. RDS to normal screen

TEF6686_ESP32.ino

@@ -2531,7 +2531,6 @@ void ShowFreq(int mode) {
   attachInterrupt(digitalPinToInterrupt(ROTARY_PIN_B), read_encoder, CHANGE);
 
   rdsreset = true;
-  RDSstatus = false;
   licold = 254;
   ECCold = 253;
   afmethodBold = false;