Multiplayer performance improvements

‍tl;dr - Using Sail with other people works much more smoothly now

Features

• Watch videos together!
• Play time is synced across everyone watching
• Performance improvements across the board
• Sail can handle more simultaneous users at once now
• Less lag for shared actions (e.g., scrolling and typing)
• Fewer frame drops for sites like Figma or Google Docs (i.e., increased WebGL performance in multiplayer websites)
• New title design for boards

Fixes

• Users now time out correctly
• Fixed lines not being drawn correctly for message cards with referenced cards
• Clicking “focus button” now consistently zooms to fill screen for web cards
• Fixed references being clickable in message cards
• Fixed autofocus on invite cards
• Fixed loader for multiplayer websites
• Fixed stale screenshot previews for multiplayer websites
• Fixed URL not updating for multiplayer websites
• Fixed update card for multiplayer websites
• Fixed various issues where multiplayer websites would not start correctly in adverse network situations

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