R1:2c065f3f3d7b

Add a list view for Nuance sources

Summary: Ref T8434. Now you can list them.

Test Plan: Listed sources.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T8434

Differential Revision: https://secure.phabricator.com/D13162