status on undo

[Darin Adler <darin eazel com>]

We have a 3/4-done (working, checked in to cvs, but still messy) framework
for doing Undo across a set of Bonobo controls in Nautilus. Before I lay out
the details of our implementation so we can consider moving it into Bonobo
at some point, I was wondering if anyone else was working on Undo and if so,
what progress had been made.

    -- Darin