R1:8bbed7974d62

Fix some form layout issues in settings

Summary: Form inputs with just text or certain selects had extra space. This uses better text centering.

Test Plan: Review forms on all Settings pages, Custom Policy, Herald.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17005