[Web] UX improvements

[tusharsadhwani]

• add separation between messages
• hover to highlight a message, and show a non intrusive copy to clipboard button, or maybe just click to copy with a small notification
• show room code on top of msgbox screen
• ui design and colors are kinda wack. Latest colour and UI tweaks make it pretty good actually

[tusharsadhwani]

Make links clickable