Minor CSS touches to workboard quest experience

Summary: minor spacing updates, but i need to likely take a more details pass, specifically points look janky with project tags since they are not in the same li.

Test Plan: Zoom into tags, see they all are same height and align.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D15255