Summary:
Ref T7689. We may not propgate the viewer down to the controls in some rendering pathways. An example is "Create Task..." on workboard columns.
Instead, move the propagation a little deeper.
Test Plan: "Create Task..." on a workboard column.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T7689
Differential Revision: https://secure.phabricator.com/D12250
983c6f9d4b