Feature Request: Being able to have the option in screen.php to have input fields for expiration date

[mr0bass]

Hi,

I tried to implement this on my own but wasn't able. Hopefully a kind pro-grammer instead of me noob-grammer can implement it.

In the screen.php it just would be great to have some to have a slider or something similar nice to add an expiration date.

Maybe even with two modes:

1. Enter specific Date
2. Add x days from today

and/or

A Special barcode for that reason.

Thanks!