* Consequently ignore empty MQTT state payloads and set state to `unknown` on "None" payload
* Do not change preset mode behavior
* Add device tracker ignoring empty state
* Ignore empty state for lock
* Resolve merge errors
* Fix mqtt valve is not resetting opening or closing state
* Require state or position attr in JSON state update
* Do not change `_attr_is_closed` if valve reports a position
* Add comment, use tuple
* Call _update_state
* Add mqtt valve platform
* No stop topic-reports_position and validation
* Do not allow state_open, state_closed with position reporing valve
* Allow open/close feature to be disabled
* Follow up comments
* Rename
* Apply defaults in validator
* Update docstr
Jan Bouwhuis
Erik Montnemery
Marc Mueller