Range Editor: vh range values (and other non-absolute units) are shown as calculated pixel values

E.g. https://scroll-driven-animations.style/demos/cover-to-fixed-header/css/

When you inspect the`#sticky-parallax-header` element and edit the range, the `animation-range-end` shows up as a pixel value. This is not how it was declared in the CSS. The CSS reads `animation-range: 0vh 90vh`.

Open the linked demo and inspect #sticky-parallax-header in the Range Editor, focusing on how animation-range: 0vh 90vh is displayed. Reproduce the issue and verify that non-absolute range values remain represented as their declared vh values rather than calculated pixels.

Written by the indexing model from the issue text.