Remove viewed videos from New Items list (Dashboard/Media Library)

[#1]

I really hate the way the "New Items" list works in the Media Library/Dashboard.  Right now, it will list any items that have been added to the Media Library within whatever timeframe you want (today, last 7 days, last month, etc).

It would be MUCH better if new videos added to the Media Library showed up in the New Items list and *stayed there* until viewed, after which they'd drop off the list.

This way I could sit down and say "oh look, I have a new Family Guy episode available", I could then view it, and have it automatically drop off the list. Similarly, if I *didn't* watch it, it would stay on the New Items list forever.

Also, there should be an option to "Clear all New Items" and basically mark all unviewed videos as viewed without having to go through them one by one