DDF-905 Changing format of configuration passwords to match web console.

Right now the web console passwords for configuration, if there is no password, will show a default password of 'unmodified'. The admin UI previously showed nothing. Now if there is no password, we'll also so the 'unmodified' password. These passwords are hidden of course.
I'll set something on the submit data to remove unmodified if we catch it. Easy enough imo.