- moved configuration checkup to external file to make sensor and gateway files smaller.
- for sensors the config now only is shown if the sensor does NOT return from Deep Sleep. For example when pressing the reset button or after a crash.
- for gateways the configuration is shown once and also can be forced to be shown with a reset. Code should work for ESP32 and ESP8266 - have only tested it with ESP32.
- fixed issue in fdrs_functions.h - if MQTT_AUTH was enabled but WIFI disabled, the compile crashed.
