Switch the My Account page to use the new Djblets Config Forms code.
Review Request #5588 — Created March 4, 2014 and submitted
This places the My Account page classes on top of the Config Forms
codebase. Config Forms takes care of all the actual rendering and
management of pages. The My Account classes handle the registration and
additional work needed by the page. No functionality or presentation
Viewed the My Account page and tested every form. Everything continued
Unit tests passed.