The various knobs and gewgaws in the account settings had grown organically,

and were kind of a big mess. We had things spread around too many pages and in

somewhat random order.
This change rearranges things so that the user profile information comes first

(name, e-mail address, avatar, etc). Next is settings, which includes general

settings and notifications. Groups is moved to be third on the list (instead of

first), and finally the authentication page has the password and API tokens

together.

Ran unit tests.
Verified that loading and saving all of the various settings worked correctly.