Fast option for scan setpoint command

[lstebel]

In most cases the setpoint scan is used to effectively modify the setpoint only for a limited number of channels (in some cases just one or two...) but still it takes the same time as if the total of 52 control channels were to be modified.
To overcome this powerup/powerdown speed limitation, the scan setpoint should have a FAST option flag such that for any channel that happens to have the same value in initial and final setpoints, the channel is set to initial value during step #0 and then the channel may be ignored during all of the following steps in that scan.
This feels much more robust than any approach based on control groups, because it does anyway involve all the channels.
Please see if this is feasible.

[lstebel]

Well done.