[SYS] Add failsafe mode (#1673)

A press at start during more than 30s after a previous reset will start the board in failsafe mode

main/ZsensorGPIOInput.ino

@@ -66,6 +66,15 @@ void MeasureGPIOInput() {
         resetTime = millis();
       } else if ((millis() - resetTime) > 3000) {
         Log.trace(F("Button Held" CR));
+        InfoIndicatorOFF();
+        SendReceiveIndicatorOFF();
+// Switching off the relay during reset or failsafe operations
+#    ifdef ZactuatorONOFF
+        uint8_t level = digitalRead(ACTUATOR_ONOFF_GPIO);
+        if (level == ACTUATOR_ON) {
+          ActuatorTrigger();
+        }
+#    endif
         Log.notice(F("Erasing ESP Config, restarting" CR));
         setup_wifimanager(true);
       }