Bug#946434: /usr/games/ace-freecell: feature request: add undo funktion

[Parodper]

On Mon, 2 Dec 2019 09:47:10 +0100 treaki <treaki at treaki.tk> wrote:
> the ace of pinguin cardgames work grate, but it would be much better if 
> you would provide an undo feature like sgt- suite dose, with u and 
> crtl+z to undo and r and ctrl+y or ctrl+shift+z to redo all steps.

Note that the games (all of them I think) can already undo by pressing 
backspace, but can't redo.