if wifi is lost the ESP was blocked on a "MQTT connection loop"

To avoid that check the status of wifi connection before trying to connect to mqtt
Add of traces

main/main.ino

@@ -828,8 +828,10 @@ void loop()
   //MQTT client connexion management
   if (!client.connected()) { // not connected
     if (now - lastReconnectAttempt > 5000) {
+      trc("client disconnected");
       lastReconnectAttempt = now;
       // Attempt to reconnect
+      if (WiFi.status() == WL_CONNECTED){
         if (reconnect()) {
           lastReconnectAttempt = 0;
         } else {
@@ -848,6 +850,9 @@ void loop()
             }
           #endif
         }
+      }else{
+        trc("wifi disconnected");
+      }
     }
   } else { //connected
     // MQTT loop