Removing users from a conversation

Is there a way to remove users from a private conversation? It is too easy to add people by accident, and I would like to be able to remove them, but cannot see how to do this.
I am also finding that starting a new conversation is throwing a few random people into the conversation list, including some deleted users. I don't know if this is just my system, or something that was an issue in 2.0.13, but it's a bit worrying. I'll investigate and report back any definite findings.
I am also finding that starting a new conversation is throwing a few random people into the conversation list, including some deleted users. I don't know if this is just my system, or something that was an issue in 2.0.13, but it's a bit worrying. I'll investigate and report back any definite findings.
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