Gravatars and UI/UX consistency
Profile pictures!!!

Sync's user list always had user pictures but until now they were only used display the user's role. Now you can set a Gravatar username/email when setting your nickname.

UI/UX improvements
- Dialogs now apply changes when you press the enter key.
- Switched out
<div>
based buttons to proper<button>
-s cursor: pointer
in more places to indicate that elements can be clicked
Bug fixes
- Fixed YouTube videos
- You can no longer send empty messages