DDF-900 Fixing model binder removing values of configuration lists

Fixing an issue where model binder was removing the values of a configuration list. This was done because it is confused to the values it's watching. Removed model binder from watching the list and then set up the handling ourselves.
Merge pull request #47 from jerenhicks/feature/DDF-900_config_item_list_not_showing

DDF-900 Fixing model binder removing values of configuration lists
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.