Hide "Joined Team" and the created/deleted postings in the General Channel
When a member joins or is added there is a generic posting created in the General Channel. This can cause the Channel to become very cluttered with useless information. Same for the added/deleted posts. I would like for the teacher generated Posts to take priority and not get pushed up and out of sight. Also, it would be nice to set a particular Post as a priority, like how you can pin an e-mail in Outlook to stay at the top.