R1:fa6151778fe8

Fix Legalpad "Sign" box

Summary: Missed converting this page, scenario. The box was poorly formatted.

Test Plan: Create a new document that needs signed, verify box is correctly spaced and colored.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D15591