[Users] Age of TRAC tickets

I took the liberty of adding a column "time" to the default TRAC display options, showing the age of the ticket. This is especially useful if you follow the "View all open tickets (only pending review)" link.

There are 12 tickets that have patched attached, ready to be committed if someone invests the time examining these patches. These tickets are between 3 weeks and 5 months old. I encourage all Einstein Toolkit users to have a look, and if you find you are interested in one of these patches, do not hesitate to leave a comment there.

-erik