Sidebar: Show home button on mobile.

Home Sidebar: Remove top bar.

Jump to existing message if exists.

Translate age gate.
Add additional limitations on KaTeX.
Prevent any message overflow.

Hook events into Markdown render using ref.

Fix: Show correct time format on left side of messages.

Temporary change: Prevent TextFile from loading large content.
Fixes #1: File preview failing with JSON files.
Add a way to open text files in new tab.

- Image embeds actions now use a better styling that's the same as the other action stylings

Allow 20 max rows on message area.