Create page for editing user accounts

[crawfoal]

There is an existing one (provided by Devise, at /user_accounts/edit), but we will want a custom one. We want a different header, and for now we don't want to allow users to cancel their registrations. We need to think about what data will be deleted when they cancel their registration. Will we keep their data, but mask their identifying information? Should we just delete everything? Should we give them an option between the two? I.e. they can do a "suspension" where their identifying information is masked, or they can do a "full delete."

[crawfoal]

This will probably be a full template, not just a partial. I think if we put it under user_accounts/registrations/edit.html.css or something like that, the Devise controller will automatically pick it up.

[crawfoal]

To completely disable the deleting of user accounts, we need to remove the route too. We should review all Devise routes and remove the ones we haven't tested or worked with yet.