Fix quick create on mobile

Summary: Fixes T4903. At some point maybe-soonish we should maybe go make `"device" => true` the default, and put `"device" => "hella-busted"` on the remaining bad pages.

Test Plan: L@@K @ W/ iOS Simulator

Reviewers: chad

Reviewed By: chad

Subscribers: epriestley, k

Maniphest Tasks: T4903

Differential Revision: https://secure.phabricator.com/D8863