feature request: customcss autocomplete/ide-ish features

[gaygoblin]

What do you want to see?

to make the experience of making a theme that includes Customcss more enjoyable, i would like for the Customcss textbox to be expanded to a more "mini-ide"-like experience with autocomplete of things like classnames and the like, and especially proper linting and code formating.

PWA

• Yes, this feature request is specific to the PWA.

[gaygoblin]

oh, and another thing that would help is making the customcss its own tab instead of a dropdown