* removed default value from required parameter; raising PlatformNotReady when connection to nut unavailable; output human-readable state name by default
* removed superfluous sensor name part; showing human-readable form and raw value of current status in more info dialog
* introduced a new virtual sensor type based on the raw status value but used to display a human-readable form of the status
* renamed method
* format string instead of concatenation
* revert the change to the device state attributes - only output the human-readable status without the raw value