R1:911aaee89ccd

Convert config to application PHIDs

Summary: Ref T2715.

Test Plan: Used `phid.query` to load config entries. Edited config entries.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2715

Differential Revision: https://secure.phabricator.com/D6520