I now have a controllable flat panel and would like this feature also. It amounts to going to a pre-set alt-az location and turning off tracking. For me the park location would be different from the 'take flats' position. I can define the park position to be the take-flats position - but then I need to manually slew the scope to be able to shut it down and cover it.
It's not a high priority but I can definitely see the value.
I may be able to make it work by invoking a script with the alt-az values embedded in it, prior to taking flats.
As long as the mount allows altaz slews, it seems doable.
Frank