Paste Track Data relative to current Window position

When pasting track data from one Window to another, I would like the ability for the track data to be applied to the new window as relative offsets to the current position of the Window that it's being applied to, so that the Window doesn't jump to a totally different position after pasting the Track data.

Usually you want to apply tracking data to a mask/window after you've drawn and placed it in its initial position. So when you apply tracking data to an existing window, it should not move the position of that window, much like how in After Effects, Parenting a layer to a null object with Transform data on it does not--by default, at least--change the position of the child layer at the frame on which the parenting operation was performed.