"Undo" button in capplets

[Denis Washington <dwashington gmx net>]

Hello,

I have noticed that some capplets have "Revert" or "Reset to Defaults" 
buttons for certain settings. How about building a more general way of 
this functionality into all capplets? My idea would be to add an "Undo" 
button next to the "Close" button of each capplet (or "Finish", but 
that's another debate... ;). This button would then revert the last 
single change a user made. That way, the user could undo a few changes 
without automatically losing all changes he or she made since starting 
the capplet. The undo history would best start with the start of the 
capplet, so undoing as much as possible would be the same as "Revert".

Comments?

P.S.: I think "Undo" would also stress that the dialogs are 
instant-apply and may make that more "natural" to novice users.

Regards,
Denis