Add some more options to the "core" group.

Summary:
Refs #2255 and completes the first group ("CORE") in @epriestley's comment
thereof.

Test Plan: Saw the new options appear in the list and save correctly.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4317