Suggestion: Undo button

After I was annotating a game between two grandmasters I proceeded to go over the annotations to make sure that they were accurate and grammatically correct. I edited one annotation, and to have it show up in the list of moves, I clicked my mouse, which happened to land on the Delete Moves button. This permanently deleted half of the game. I have no way of undoing this mistake, and now I have a lot of extra work ahead of me. I think it would be convenient to have an undo button in the Chess Position, Game, or Puzzle window.

Yeah, it's frustrating. But you really don't have a need for an undo button if you just make sure you don't click your mouse.

It used to be that if you just made the next move, it would put the current annotation on the next move. That's why I'm accustomed to clicking the mouse.