R1:5b3ccfd95fb9

Move people list rendering into SearchEngine

Summary:
Ref T4986. One note:

- We have a separate "browse directory" capability, to provide some soft privacy for users of public installs. Respect that policy within the SearchEngine.
- Also restore some other icons I missed earlier.

Test Plan:
- Viewed people list.
- Build people panel.
- Verified people panel was just me without browse capability.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T4986…