Disable Differential 1up views in all cases for now

Summary: They're buggy and I'm not going to get to fixing them for a bit and they trigger on Macbook Airs and such.

Test Plan: Reloaded a revision in a narrow window.

Reviewers: btrahan, chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D4490