Fix Harbormaster and Phortune icon placement

Summary: Fixes T4261

Test Plan: Verify hover states in Photoshop and on app pages.

Reviewers: epriestley

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Maniphest Tasks: T4261

Differential Revision: https://secure.phabricator.com/D7839