CSS lint

[Mottie]

This isn't a huge deal, but in the style editor, there are some CodeMirror css lint errors for svg's fill & stroke:

And maybe keep an eye out for position:sticky which is still experimental and currently only works in Firefox & Safari.

[tophf]

CSSLint's maintainer doesn't want to add these properties until he has time to make stuff configurable (one, two). However, I think we may just use these PRs and assemble our custom CSSLint, I'll look into it. Maybe it makes sense to add a config popup/dropdown with checkboxes for the 37 lint rules...