Save currently active receiver and restore on reboot (#1091)

* save active receiver and restore on reboot

Co-authored-by: Kern, Thomas <thomas@kernwelt.de>

main/ZgatewayRTL_433.ino

@@ -116,7 +116,7 @@ extern void MQTTtoRTL_433(char* topicOri, JsonObject& RTLdata) {
       pub(subjectRTL_433toMQTT, "{\"Status\": \"Error\"}"); // Fail feedback
       Log.error(F("MQTTtoRTL_433 Fail json" CR));
     }
-    enableActiveReceiver();
+    enableActiveReceiver(false);
   }
 }