* Add Modbus cover
* Fix improper commands written for Modbus cover via coil
* Make changes per review comments
* Fix default hub not defined
Since support for multiple hubs was added, the default hub option
was not implemented correctly. Now I added necessary logic to make
it work. First hub in a list will be used as a default hub.
* Move Cover config under Modbus section
* Revert setting up a default hub alias
* Make hub mandatory for Cover
* Add default scan interval
* Read scan_interval from discovery info
* Fix linter error
* Use default scan interval from Cover platform
* Handle polling for Modbus cover directly inside entity
* Move covers under hub config
* Fix for review comment
* Call update() from Cover actuator methods
* Fix time validation
Philip Allgaier
jan iversen
Vladimír Záhradník