R1:5192ae47509e

Update all existing ProfileMenuItems for the more-structured API

Summary:
Depends on D20357. Ref T13275. Now that there's a stronger layer between "stuff in the database" and "stuff on the screen", these subclasses all need to emit intermediate objects instead of raw, HTML-producing view objects.

This update is mostly mechanical.

Test Plan:
- Viewed Home, Favorites, Portals, User Profiles, Project Profiles.
- Clicked each item on each menu/profile type.
- Added every (I think?) type of item to a…