* restructure serial debug output (partly)
+ MI - more code review
* fix debug output for power control cmds
* MI - limitation commands answered
* Debug - add more macros and texts
Might as well help for https://github.com/lumapu/ahoy/pull/478
Unfortunately, this atm doesn't really lower used flash memory
* MI - limit command
- now seems to work for MI-600 (to be verified)
- debug - more use of macros (wrt. to real effect see last remark)
added part of mac address to MQTT client ID to seperate multiple ESPs in same network
added dictionary for MQTT to reduce heap-fragmentation
removed `last Alarm` from Live view, because it showed always the same alarm - will change in future
reenabled FlashStringHelper because of lacking RAM
complete rewrite of monochrome display class, thx to @dAjaY85 -> displays are now configurable in setup
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)