Property frz of an segment should be writeable

[Huseriato]

The property frz and sel are controlling if the segment is automatic mode or if the LEDs are controlled directly.

In my example I use a script to control the leds via the api and another simple blockly to control the idle effects of my stripes. I would be really nice to control this datapoints using the object. I don't know why sel is writeable and frz is not, but via api this can be controlled. I think this has to be a really simple task.

[DutchmanNL]

The property frz and sel are controlling if the segment is automatic mode or if the LEDs are controlled directly.

should be writable now in version on git, will make a new release later

I think this has to be a really simple task.

happy to receive an PR next time ;)