pht() for Settings

Test Plan:
did a run with ALL CAPS through `/settings/` and subpages. This includes changing (and forgetting) my password.

Did not test the following:

 - LDAP

Reviewers: epriestley, btrahan, chad

Reviewed By: chad

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5174