Swarm: Remove a device from the conversation

• Implement https://git.jami.net/savoirfairelinux/ring-project/wikis/Group-chat-feature-(design-draft)#remove-a-device-from-a-conversation
• Add tests

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changed title from Swarm: Remove a device from the conversation to Swarm: Remove a device from the conversation (NEEDS DESIGN)

changed title from Swarm: Remove a device from the conversation (NEEDS DESIGN) to Swarm: Remove a device from the conversation

changed title from Swarm: Remove a device from the conversation to Swarm: Remove a device from the conversation (NEEDS DESIGN)

changed the description

added SprintIn progress label

changed title from Swarm: Remove a device from the conversation (NEEDS DESIGN) to Swarm: Remove a device from the conversation

changed the description

removed SprintIn progress label

mentioned in commit ce617494

mentioned in commit 8a105278

closed

added swarm label