Update Fibaro devices with value 255 used in a list.
ZWave defines configuration values as signed numbers, however Fibaro lists some numbers as signed. This can be resolved for values that are typed in, however for values in lists, this needs to be treated as signed, otherwise the system will ignore these values.
Merge pull request #1555 from cdjackson/zwave-fibaro_unsigned_values

Update Fibaro devices with value 255 used in a list.