R1:be7355815624

Update form input styles.

Summary: Adds a slight blue border, radius, and shadow to inputs and textareas (small). Better padding for legibility as well.

Test Plan: Review a number of forms

Reviewers: epriestley, vrana, btrahan

Reviewed By: btrahan

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4383