What functionality is missing? What is unsatisfying with the current situation?

  It would be fantastic to have a check box or such to toggle off your world custom css from the world styling page or the css presentation editor. This could very easily allow you to see if your css is breaking or interfering with something.    

How does this feature request address the current situation?

  Allows you to quickly and easily disable your world custom css without removing the css out into something like notepad with the chance of a mistake, and even worse loosing css.    

What are other uses for this feature request?

  This could become a useful tool when helping users in the Discord Help and CSS channels or in response to Github trouble tickets.   Thank you       Article Link