Files panel displays human-readable titles.

Lists category titles and uploader's real name instead of
the names. The name components can be viewed by
hovering over the column.

See issue #327

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5248 2fea6a4d-a838-0410-917b-93a53c48e9d2