When an admin/mod views a question thread, and the group has
moderate_answers_to_enquirer=True, control to toggle published status of
each answer should show 'publish' or 'unpublish' as appropriate (used to
always show 'publish')
https://trello.com/c/wauM4itD/293-1-groups-sharing-publish-unpublish-unpublish-not-displaying-once-an-answer-is-published