Add autocomplete=off to all non-login password forms
Summary: Fixes T5579. Modern browsers aggressively autofill credentials, but at least Firefox still behaves slightly better with this flag. Hopefully other browsers will follow suit.
Test Plan: Browsed various interfaces, verifying that login interfaces allow autocomplete while non-login interfaces do not.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T5579
Differential Revision: https://secure.phabricator.com/D10253