This works around the fact that sengled element touches can get back
into a state of reporting an invalid value (of FF) if the physical
button on the bulb is used to cycle back to the 100% state. Here we
interpret FF as FE for sengled and then issue a move to level command to
put it in a state where it will report FE until the level is changed
again.
This resolves: https://smartthings.atlassian.net/browse/DVCSMP-2597
This works around the sengled bulbs not following the ZCL spec and using
the value 0xFF as a valid level (the spec says it should be invalid).
It does this by manually setting the level of the bulb to
0xFE (SmartThings 100%) when it is configured, or if it previously had a
level set, manually setting it to that value. This avoids the issue of
the bulb reporting 0xFF and having the library ignore it because it is
an invalid value.
This resolves: https://smartthings.atlassian.net/browse/ICP-691
DTH UX Improvements for the following DTHs:
1. Hue Bulb
2. Lifx Color Bulb
3. Lifx White Bulb
4. Smartpower Outlet
5. Zigbee Dimmer Power
6. ZLL RGBW Bulb
7. ZLL White Color Temperature Bulb
