* moved MqTT info to `system`
* added CMT info for ESP32 devices
* improved CMT settings, now `SCLK` and `SDIO` are configurable #1046, #1150
* changed `Power-Limit` in live-view to `Active Power Control`
* increase length of update file selector #1132
* add option to strip webUI for ESP8266 (reduce code size, add ESP32 special features; `IF_ESP32` directives)
* started to get CMT info into `system` - not finished
* improved RSSI for NRF24, now it's read per package (and inverter) #1129
* arranged `heap` related info together in `/system`
* fix display navi during save
* clean up binary output, separated to folders
reduced maximum allowed JSON size for API to 6000Bytes #660
small fix: output command at `prepareDevInformCmd` #692
improved inverter handling for MQTT #671
improved `isAvailable`, checkes all record structs, inverter becomes available more early because version is check first
fix tickers were not set if NTP is not available
disabled annoying `FlashStringHelper` it gives randomly Expeptions during development, feels more stable since then
moved erase button to the bottom in settings, not nice but more functional
split `tx_count` to `tx_cnt` and `retransmits` in `system.html`
fix mqtt retransmit IP address #602
added debug infos for `scheduler` (web -> `/debug` as trigger prints list of tickers to serial console)
improved wifi initial connection - especially if station wifi is not available #509
removed new operators from web.h (reduce dynamic allocation)
improved sun calculation #515, #505
fixed wifi auto reconnect #509
added disable night communication flag to MQTT #505
changed MQTT publish of `available` and `available_text` to sunset #468
added icons to index.html, added wifi-strength symbol on each page
moved packet stats and sun to system.html
refactored communication offset (adjustable in minutes now)
