Bugfixes and more features for new Json Editor

This update has:
• Can now right click on tabs to do cool stuff
• Middle click with mouse auto closes tabs
• Can now "View original" for all files at the click of a button. They will be Read-Only
• Many bug fixes!
• Removed a lot of unnecessary code. Things might seem the same but under the hood a lot is different and better
• More support for users who dont have a game