bwduncan 9ab8622d72 Fix Nissan Leaf default states (#59866)
* Fix default states and add device_class.

Car data is initialised to zero, which means that graphs have an ugly
drop to zero in them when HA is restarted. We should report "None" when
the state is unknown.

We need to use availability to signal whether binary_sensors have
sensible data or not.

We can remove the custom icons and use the defaults provided by using
appropriate device_class.

* Make isort happy.

* Explicitly return None

* Remove feature from bugfix PR.
2021-11-18 15:18:25 +01:00
2021-09-03 22:17:10 -07:00
2021-07-28 14:19:21 +02:00
2021-11-14 16:56:09 +01:00
2020-03-23 00:39:37 +01:00
2020-04-27 12:09:31 +02:00
2017-10-24 19:36:27 -07:00

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