DDF-669 DDF-670 DDF-682

DDF-670 - Restyles the admin application modules.  Setup initial application selection page for Jeren and Sam's work.

DDF-669 - Created Feature management backend API and Feature UI via
config plugin.

DDF-682 Created configuration plugin API framework.  Adjusted
configuration UI to work within a Configuration Plugin.
It looks like this is the old version of ConfigurationEdit.view.js in the configuration module. I would prefer if we could just reuse that view rather than copy and paste it into here (and use the current version that has been fixed, rather than this version).