Enable NCrunch on startup.

Automatically enable NCrunch so the tests can run continuously.
Fix display of modal login box.

This area was also visually broken by the upgrade to Bootstrap 3. It
also seemed that MVC was no longer willing to render the scripts section
in the partial view, so I have moved this include to the Layout instead.
Fix up Admin Area visual design.

Bring it into line with the main site by copy-pasting the HTML from the
main site. There's a lot of duplicatin in this area now, which indicates
that the Layouts perhaps could be consolidated.

Update a few of the Admin Area Views to make the pages render more
correctly (i.e. remove the page-header as they are already displayed via
the Admin Area Layout).