I can't find a mod for this. Example of the scenario: User A starts a private conversation with User B User B wants to add User C to the conversation but has no idea how User B should ask User A to add User C to conversation but they don't understand this is an option Ideally: User B sees a link in the conversation to "Request Invite". When User B click this an overlay appears: they can now request: "Ask User A to add User C to this conversation" User A gets an alert "User B wants to Add User C to the conversation, do you accept?" User A clicks Accept. User C in now part of the conversation.