Let requestors claim their code is picked

Summary:
In Releeph, ReleephRequestHeaderView will render you a "mark-manually-picked" button if (a) you are authoritative (chuckr) or (b) you are the person who created this Releeph request.

However ReleephRequestActionController, which handles these button presses, will only do something if you are (a). This patch honors your button pressing if you are (b) as well.

Test Plan: Push buttons. There's another bug in the Javascript do-stuff-without-reloading-the-page code that handles these button pushes, but I'd like to fix that separately from handling this hi-pri bug.

Reviewers: epriestley, wez

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D6036