Suggestion for "undo all" improvement

[therling]

The "undo" feature could be improved, if possible, if you could add an "undo all" so that instead of having to hit the undo control, for example, up to five times to undo the movement of three units. An "undo all" control would speed up the process of judging the odds on an attack. As it is now, choosing move and attack options is slowed enough to be a hassle, especially if you want to assess more than a few options of moves.

–Unless there is already an undo all and I just don't know where to find it.

Thanks.