Clean up Profile Menu Item page

Summary: Cleans up the UI on the page here, uses two column layout, places actions as actionlist instead of dropdown. Changes edit pages to dialogs.

Test Plan: Add an application, divider, link, and facts to a menu page.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17030