Currently we normalize all CSS property names in the `StylingBuilder` which breaks custom properties, because they're case-sensitive. These changes add a check so that custom properties aren't normalized. Fixes #41364. PR Close #41380
Currently we normalize all CSS property names in the `StylingBuilder` which breaks custom properties, because they're case-sensitive. These changes add a check so that custom properties aren't normalized. Fixes #41364. PR Close #41380