Issue with light sensor[BUG]

[vincentbraillard]

Describe the bug
after activation and desactivation of the light sensor, the brightness slider don't work anymore

To Reproduce
Steps to reproduce the behavior:
1: when starting the server with sensor off, the breathless slider work great between 0 to 100%
2: when turn on the sensor, the sensor work great also following the code
3: when turning off the sensor, the light cannot increase more than the last value when sensor was on (if 0, that 0 if a value, than this value)
4: the brightness slider work but from 0 to last value when sensor was on

Screenshots
If applicable, add screenshots to help explain your problem.

Platform (please complete the following information):
all

[texx00]

Also this should be fixed in the latest alpha. The solution was to set the brightness at maximum when the sensor is switched off. Not the best solution probably but cannot do now. This is quite related to #59: when that one is done should be possible to keep the last brightness value instead of using the maximum