Fix clone input on device breakpoints in Diffusion
Summary: The float wasn't getting reset on the definition list, so clone URI (so important on mobile!) looked terrible.
Test Plan: Tested Diffusion, Herald, and Maniphest property lists. Seems good.
Reviewers: btrahan, epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D12331