As a non-Member of the Space, I can submit comments for moderation

(User Story, To be Fixed , Priority: Low, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Conversations, Moderation
Summary: "Non-Members" potentially includes anonymous, non-logged-in. Querki does not allow non-Members to simply comment, but they may submit a comment which can be approved by the Moderators. The Owner of the Space can decide whether to allow this or not.