Use raw ID fields for the Status Update relations in the admin UI.

Review Request #9035 — Created June 26, 2017 and submitted — Latest diff uploaded


Review Board


The Status Update fields used for the user, review request, change
description, and review relations are now set to take raw IDs,
preventing this page from causing any performance issues on large
installs. This also makes it a bit easier to hand-craft status updates
for testing based on the IDs for these on a review request.

Tested that all relation fields in the admin UI were using the raw ID
field and that loading/saving entries worked.