* fixed docu #1085
* changed active power limit MqTT messages to QOS2 #1072
* improved alarm messages, added alarm-id to log #1089
* trigger power limit read on next day (if inverter was offline meanwhile)
* disabled improv implementation to check if it is related to 'Schwuppdizitaet'
* changed live view to gray once inverter isn't available
* added inverter status to API
* changed sum of totals on WebGui depending on inverter status #1084
* merge maximum power (AC and DC) from PR #1080
* MqTT alarm data was never sent, fixed
* REST API: added alarm data
* REST API: made get record obsolete
* REST API: added power limit acknowledge `/api/inverter/id/[0-x]` #1072
* merge PR #1069 make MqTT client ID configurable
* fix#1016, general MqTT status depending on inverter state machine
* changed icon for fully available inverter to a filled check mark #1070
* fixed `last_success` update with MqTT #1068
* removed `improv` esp-web-installer script, because it is not fully functional at this time
* merge PR #1056, visualization html
* update MqTT library to 1.4.4
* update RF24 library to 1.4.7
* update ArduinoJson library to 6.21.3
* set minimum invervall for `/live` to 5 seconds
* merge PR #1048 version and hash in API, fixes#1045
* fix: no yield day update if yield day reads `0` after inverter reboot (mostly on evening) #848
* try to fix Wifi override #1047
* added information after NTP sync to WebUI #1040
* next attempt to fix yield day for multiple inverters #1016
* reduced threshold for inverter state machine from 60min to 15min to go from state `WAS_ON` to `OFF`
* next attempt to fix yield day for multiple inverters #1016
* fix export settings date #1040
* fix time on WebUI (timezone was not observed) #913#1016
* fix Contrast for Nokia Display #1041
* attempt to fix#1016 by improving inverter status
* added option to adjust effiency for yield (day/total) #1028
- rework display type handling: remove uneeded checks because defined context from which functions are called
- default initialize "mMono" pointer (potential illegal memory access)
- define EXACTLY one display type for ePaper display (type 10). There is no need to use ranges and distinguish oled from epaper display. Simply one switch/case
- correct type handling for display type (javascript). Event handler gives a string instead of number (display type)