Update form styles, implement in many places

Summary:
This creates a common form look and feel across the site. I spent a bit of time working out a number of kinks in our various renderings. Some things:

• Font Styles are correctly applied for form elements now.
• Everything lines up!
• Selects are larger, easier to read, interact.
• Inputs have been squared.
• Consistant CSS applied glow (try it!)
• Improved Mobile Responsiveness
• CSS applied to all form elements, not just Aphront
• Many other minor tweaks.

I tried to hit as many high profile forms as possible in an effort to increase consistency. Stopped for now and will follow up after this lands. I know Evan is not a super fan of the glow, but after working with it for a week, it's way cleaner and responsive than the OS controls. Give it a try.

Test Plan: Tested many applications, forms, mobile and tablet.

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5860