Currently when you hit undo, it puts you back into the default select mode. I often hit undo when I paste something in the wrong location, and then need to re-copy and paste, which is annoying.
Suggestion: Stay in the current mode when undoing, and, when in move mode, don't completely undo the move but instead keep the selected area as a hologram attached to the mouse cursor so one can easily move it to a different location without reselecting.