FireMonkey: CSS error checker is faulty for more complex CSS rules. Option to turn it off?

[loxia01]

It seems the CSS error checker does not function properly for more complex CSS expressions. It warns of syntax errors that don't actually are errors (see screen). Although this does not affect the CSS rule functionality, it is a bit irritating.

Would be great if it was possible to turn the error checker off for CSS (or the error checker itself was corrected/improved).

[erosman]

FireMonkey uses CodeMirror 5 for the code editor and CodeMirror 5 uses CSSLint to lint the CSS.

Unfortunately, CSSLint has been abandoned (last release Sep 20, 2016), therefore it doesn't support newer CSS implementations.