Adding some type names to object handles

Summary:
I browsed through the applications and searched for all flaggable objects and gave them names. Only flaggable ones, since they were the only ones I deemed important for my future diff(s). Also, I thought that this method may be deprecated in some way, since it only included some older applications

Also adding proper fallback. Without makes my future diff(s) non-fatal in a user-confusing way (imagine you are displaying the object type (null ^^))

Also usable for Refs T1048

Test Plan: Used in a future diff, names appear, fallback works as expected.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1048

Differential Revision: https://secure.phabricator.com/D5514