Live stream events

Live stream related custom events.

Name	Description
fw:livestream:join	User has joined the livestream by clicking "Tap to enter livestream" for active livestreams or "Tap to watch" for replays.
fw:livestream:quit	User dismisses livestream player.
fw:livestream:send-chat	User has sent the chat message.
fw:livestream:send-heart	User interacted with "hearts"