`Join call` should not show if you are in the call swarm

1. Call a swarm where you are the only person in the swarm
2. Open the Chat and Join call shows. Is this a bug as you are already in the call? Please see image below

Thank you

jami-daemon#816 (comment 45212)

mentioned in issue jami-daemon#816 (closed)

You already filled this here: #963

closed

added duplicate label