Fix display of Auditors

* `with_auditors` uses `authorizations` mapping internally, so preload
  it using `with_mapping`.  This should be done in the `with_auditors`
  helper using `defer_render`, eventually.
Fix `Indirect` mapping condition

* Was causing an exception when assigning "Auditor" role in Audit tree
Merge pull request #849 from reciprocity/feature/fix-auditor-display

Fix auditor display on MyView page