Shift for straight Clone strokes in Spot Correct

One thing that I think would make Spot Correct even nicer to use would be if the Clone brush worked the same way as the brush in Retouch when making a straight line.

In Retouch, I really like being able to hold Shift to make a straight brush stroke. I find it very useful and easy to control.

It would be great if the Clone brush in Spot Correct could use the same Shift behaviour for straight strokes, particularly when working on fine details.

I really like the way this works in Retouch and think it would be a useful addition to Spot Correct too.