R1:4caa684724f2

Simplify Project status field

Summary:
This was a sort of speculative feature added by a contributor some time ago and
just serves as a label; for now, simplify it into "active" and "archived" and
remove "archived" projects from the "active" list.

- Fix a bug where we'd publish a "renamed from X to X" transaction that had no
effect.
- Publish stories about status changes.
- Remove the "edit affiliation" controller, which has no links in the UI
(effectively replaced by join/leave links).
- Add…