Swarm:Compat with Non-Swarm clients, remove swarm must remove messages
Scenario
- Alice (client-qt, swarm) adds Bob (non-swarm client)
- Alice will create a swarm that should be shown
- Bob accepts the invite
- Because Bob is a non-swarm compatible member, the swarm is deleted, but contact still present
Current result
When conversation is removed, old messages are still there.
Expected
Messages from swarm should be deleted