Prepare a replacement for Controller->renderHandlesForPHIDs()
Ref T7689. This gives HandleLists renderList() and renderHandle() methods, which return views that can perform just-in-time data fetching and generally look and feel like other rendering code, instead of being odd pseudo-functional methods on Controller.
Also converts callsites on the Maniphest detail page to use these methods.
Next changes will wipe out more of the callsites.
- Viewed Maniphest detail page with many relevant handles.
- Created a new subtask.
Reviewed By: btrahan
Maniphest Tasks: T7689
Differential Revision: https://secure.phabricator.com/D12205