Populate the "Quick Create" menu from EditEngine

Summary:
Ref T9908. When there are custom / renamed / policy considerations for applications, respect them in the quick create menu.

This has some performance implications, in that it makes every page slower by two queries (and potentially more, soon), which is quite bad. I have some ideas to mitigate this, but it's not the end of the world to eat these queries for now.

Test Plan:

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9908

Differential Revision: https://secure.phabricator.com/D14693