R1:4bb920f396be

Tighten up ObjectItemList icons

Summary: Pulls the icon flush right in the objectlistview.

Test Plan: Review my stale diffs, and UIExamples page.

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: Korvin, aran

Differential Revision: https://secure.phabricator.com/D6875