If LEDs>100, stalls ESP8266. So bunch of code cleanup and merge with
existing variables used by other sections. Should be more efficient. As
of now on Arduino ESP 2.4.1, WiFi.setSleepMode(WIFI_NONE_SLEEP); is
required for MQTT function. ESP8266 is anyways connected to constant
power supply, so power consumtion is not immidiate concern now.
* HTTP OTA
* Arduino OTA
* Async MQTT
* PubSubClient
* HomeAssistant
