[BT] Regular BLE system parameter pub (#1422)

Publish BT config parameter at start so as to update the switch statuses in the controller
Also publish regularly in case of controller restart
Also move btqsum, btqsnd and btqavg to BTtoMQTT topic instead of SYStoMQTT as they are more relevant here

main/main.ino

@@ -1492,6 +1492,9 @@ void loop() {
       if (now > (timer_sys_measures + (TimeBetweenReadingSYS * 1000)) || !timer_sys_measures) {
         timer_sys_measures = millis();
         stateMeasures();
+#  ifdef ZgatewayBT
+        stateBTMeasures(false);
+#  endif
       }
 #endif
 #ifdef ZsensorBME280
@@ -1562,12 +1565,7 @@ void loop() {
       if (disc)
         launchBTDiscovery(publishDiscovery);
 #  endif
-#  ifndef ESP32
-      if (BTtoMQTT())
-        Log.trace(F("BTtoMQTT OK" CR));
-#  else
       emptyBTQueue();
-#  endif
 #endif
 #ifdef ZgatewaySRFB
       SRFBtoMQTT();
@@ -1705,10 +1703,6 @@ void stateMeasures() {
 #  ifdef ZgatewayBT
 #    ifdef ESP32
   SYSdata["lowpowermode"] = (int)lowpowermode;
-  SYSdata["btqblck"] = btQueueBlocked;
-  SYSdata["btqsum"] = btQueueLengthSum;
-  SYSdata["btqsnd"] = btQueueLengthCount;
-  SYSdata["btqavg"] = (btQueueLengthCount > 0 ? btQueueLengthSum / (float)btQueueLengthCount : 0);
 #    endif
   SYSdata["interval"] = BTConfig.BLEinterval;
   SYSdata["scanbcnct"] = BTConfig.BLEscanBeforeConnect;