As a Moderator, I can Archive a thread

(User Story, To be Fixed , Priority: Medium, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Conversations
Summary: "Archiving" means that this thread is considered closed and done. The intended use case is for when the thread was about making changes which have happened, or when the conversation has been deemed a dead end. The archived thread is still generally accessible, but requires an extra mouse click to view it, and no one can comment in it.