🚀 go-pugleaf

Somebody a while back mentioned something about extending MacApp
to allow for multiple undo operations as opposed to just being
able to undo the latest command.

Is there a reason why this wasn't implemented in MacApp? 

It seems to me that it wouldn't be too hard given the current MacApp
framework.  Instead of MacApp <Commit>ing the last command before
<Doit>ing the current one, why couldn't it keep all the commands 
on a stack and thus it could successively undo each operation.
I guess as you undid commands, you would have to keep another stack
to be able to redo each command.

The only problem that I see is when to <Commit> the commands.  You could
either allow a maximum undo stack, or you could commit commands only when
something like a file save was being performed.

Is this resonable, or have I overlooked something?
-- 
Phil Trubey      
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