Updated "old" manage assessment view

Uses new look & feel from the new LTI domain launch
Delivery settings list view updated to new look
Updated 'show delivery' view to use new L&F
Fixed regression in DataDeletionService
Changed Delivery creation - now uses form
Tidied up remaining old instructor views
Enhanced recent change to AP naming.

We now use the name of the package file rather than the XML
within, as this will probably be more meaningful to people.
(The XML is used as a fallback is the package name was not sent by
the browser.)
Final tidy of older instructor MVC

I've merged the deliveries list into the "show assessment" page,
which simplifies things a bit. Some further changes to nav & breadcrumbs
to make it clearer how to move around.
Final tidy of instructor MVC