Support value < feature (500px > width)

Chrome CL: https://chromium-review.googlesource.com/c/chromium/src/+/3168637
Spec: https://drafts.csswg.org/mediaqueries-4/#mq-range-context

> For example, (height > 600px) (or (600px < height)) returns true if the viewport height is greater than 600px.