Fix inbox conversation participants (#4765)
Fix inbox conversation participants (#4765)

* Fix inbox conversation participants
Check user ID against conversation.participants when rendering the link to the sender.

* explicitly cast user IDs to int

amyrebecca/Panoptes-Front-End,amyrebecca/Panoptes-Front-End,zooniverse/Panoptes-Front-End,amyrebecca/Panoptes-Front-End