Save Moves

It would be nice to be able to save a moves while in the process of making them. In our casual games, moves can sometimes take over a hour to do. The "Save" button (like the existing one that can be used after you've ended your move) would be ideal as you can put in 15 minutes here, 15 minutes there and so on, without having to end your turn in hoping that everyone else doesn't do so. It shouldn't be an auto-save though, as it is still nice to be able to exit out to undo any moves without saving when you're trying to weigh out options.

Me and a few other people have already had this idea, but so far, they haven't added that option to the player.