v2.3.35

Published only in CWS beta for now.
Notable changes since 2.3.34:

• stylelint 17.13.0, https://stylelint.io/CHANGELOG
• stylelint now uses syntax plugins for less and stylus preprocessors
• no more useless linter warnings for advanced preprocessor syntax and UserCSS variables
• customizable "rules:less" and "rules:stylus" in the editor -> linter -> Stylelint -> config dialog
• the original syntax of rgb(), hsl(), hwb() in the color picker is preserved now

Full Changelog: v2.3.34...v2.3.35

P.S. Big thanks to @pabli24 for extensive testing of the nightly builds and reporting the bugs!