* Fix#6783, remove a test that makes no sense anymore
* Fix#6784
* Fix typo in docstring
* Fix handling of known->unknown state, extended test, fix lint errors
* Better handling of mismatch in unit of measurement.
Set state to "unkown" and unit of measurement to "ERR" if unit of measurement differs between aggregatet states.
Add entity_id to logged warning.
* Make icon configurable
* Fix typo
* Fix lint
* Fix lint
* Fix lint
* Add option to set entity_id on min_max sensor
* Fix lint logging-not-lazy
* Revert "Add option to set entity_id on min_max sensor"
This reverts commit 4685f26647.
* Revert "Make icon configurable"
This reverts commit fe45aec82d.
* Fixes
* new config parameter to specify number of digits for rounding average value
* fixed two `line too long` errors
* added three new tests for the mean sensor including test for precision of mean value