Deactivate, but not delete, a control point

[jidanni]

Often we regret some of our control points,
but not to the point that we want to get a "total divorce".
We just want to turn off a point, warp again, and see if our map will look better.

Therefore there could be an additional column there on the Rectify tab Control Points section.
Perhaps near the left side, called active, with checkmarks for each control point checked by default.

Sure, one could back points up to a .CSV file etc. and then delete them, and warp again, but that is too much fuss.