addendum to PR #4293 (as noted in https://github.com/FreeCAD/FreeCAD/pull/4271#discussion_r554673632 the pointer to the UI should be a unique pointer. This PR does this for remaining TD dialogs that don't already use a unique_ptr.)
addendum to PR #4293 (as noted in https://github.com/FreeCAD/FreeCAD/pull/4271#discussion_r554673632 the pointer to the UI should be a unique pointer. This PR does this for remaining TD dialogs that don't already use a unique_ptr.)