fix skytils compat notification

fix issues with mixin 0.7.11

Add toggles for all chatting buttons

Fix transparency issues with chat fading

Various chat head bug fixes

- Fix chat heads making chat lines go over chat background
- Fix chat heads making tooltip hovers not work properly

Update README.md

fix chat head crash

fix hychat notification

fix hychat notification

fix hychat notification

fix skytils chat tab notifications not working