Add a history of keyword updates so I can undo mistakes in Bridge

I accidentally overrode previously added keywords (done in photoshop) when trying to add a keyword to a number of images and learned to my horror that keyword/metadata changes have no history and cannot be undo. Given adding metadata is one of the reasons I even use Bridge, the fact that a typo is made permanent is really frustrating. It seems from previous comments that this has been deemed to “be not a problem” by the developers, but I disagree that immediately permanent changes could be considered a feature. Bridge would be a much better program if it could at least retain previous temporary metadata change history. I don’t expect extended history, but changes made in a session should not be permanant.