Can you add cancel button when it's possible?

[Brian J. Tarricone]

Don Christensen wrote:

> Playing Devil's advocate here, I think having an "Ok" button sort of
> implies "I accept these changes", and not having a "Cancel" button along
> side is a little odd.  Changing "Ok" to "Done" would be more clear in
> my opinion.

the xfce settings dialog have a "close" button, not "ok", which is 
in-line with expected behavior for an instant-apply dialog.

    -brian