Miscellaneous fixes

* Ensure `Person.object_people` is included in resource response
* Fix two remaining `clause` changes
Don't assume or trigger preloaded data

* This is now not necessary since extended mappings are removed
* Enable full deferred chain through InnerNav controller,
  DashboardWidget controller, and TreeView controller
* Minor changes in TreeView to batch-render rows and avoid unnecessary
  delays
Add missing `include_links` entry for DirectiveSections
Merge pull request #1138 from reciprocity/feature/tree-laziness

Don't require or cause data preloading