After Apply Track min value of all channel LUTs is reset to 0

Hi @tischi,
this is more like an enhancement. 
After standard image loading the image min is set correctly to the min of each channel. 
After [Process > Correct Drift > Apply Track...] the min of the LUT is 0. I think this is due to the fact that due to the tracking you may patch with 0 values. so there are zero values. Maybe one could suppress the brightness adjustment after Apply Track?

