Add functionality to hidden matches page.

Changes the "Hidden Matches" page to give better functionality. Instead of simply displaying the names of hidden users, it now also displays:
- A thumbnail of the person's default photo.
- The user's location.
- When they were last online.

It also removes the display of "Inactive" accounts, since you can't do anything about them, anyway. This will lead to some quantity discrepancy on most pages, but I don't know how much we care about that.