Audio and visual notification setting for various features including when someone "waits in the lobby" or raises hand

[nickvergessen]

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The moderator should be able to notice when a user is waiting in the lobby, or when someone raises their hand in an active call.

Types

• Audio
• Visual

Settings

• Join call
• Leave call
• Enter lobby
• Receive chat message
• Someone raises hand

[alexanderdd]

related/duplicate? #4853