Minor improvements to Xiaomi special report handling
Minor improvements to Xiaomi special report handling

* Ignore deleted sensors
* Queue database store only when something changed (wip)

dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin