Lock/Unlocs Unit while building missions

[AvgWhiteGuy]

Unless I missed it somewhere, it would be great if we could lock/unlock units after we place them (and their waypoints) and are satisfied. 

With all the waypoint displayed it get a pretty messy when you click and Delete 1 waypoint and find out you did the wrong unit(s).

 

Or maybe be able to build and organize in layers...like an Adobe Photoshop or Illustrator project.

It would only affect Mission Editor, not even be visible to the DCS.exe

 

And finally, UNDO...I'm sure everybody has been asking for this editing feature!!!!