[Fixes #1299] Restore thumbnail data to public channels API.#1367

Merged

jayoshih merged 1 commit intolearningequality:developfrom kollivier:thumb-meet-nail

May 17, 2019

+59-4

Commits on May 14, 2019

[Fixes learningequality#1299 ] Restore thumbnail data to public channels API. Also fix content type value for public JSON endpoints.
kollivier
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