[feature request] use true add date to mark as new

[jengwen]

I love the ability to have IPTC description, keywords, and date automatically be filled in.  I like using the IPTC date for the date on my pictures; however, it does cause newly added pictures not to be marked as new if they were taken awhile ago.  Would it be possible to add a second date field (wouldn't have to be updateable or displayable on the screens) that contains the true add date and use that for marking photos as new?