R1:22d7b543787f

Add missing "phabricator-remarkup" div

Summary: Fixes T3652.

Test Plan: Created a Ponder question with fancy remarkup in the descriptive text.

Reviewers: btrahan, Firehed

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T3652

Differential Revision: https://secure.phabricator.com/D6632