How about a real history stack?

 From:  Michael Gibson
6918.2 In reply to 6918.1 
Hi Paul, it is something that I want to work on in the future. It is a complex area of work though, since it will involve saving a potentially very large amount of data. So it will take a significant development effort to do it. It is something that's on my list to dig in to in the future though.

- Michael