Conpherence - fix send bug for users with no javascript

Summary: we should do a redirect if its not an ajax request, which solves this problem since folks with no javascript aren't sending ajax requests. Fixes T5049.

Test Plan: inverted the predicate, tried ajax requests, and got redirected

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5049

Differential Revision: https://secure.phabricator.com/D9149