fix: parentStackingContext of elements inside a ShadowRoot

[edenilan]

parentStackingContext of elements inside a ShadowRoot is not necessarily "html"

[gwwar]

Thanks for the PR @edenilan and looking over the related specs! I think the behavior here makes sense, I tried testing this against the MDN example at https://developer.mozilla.org/en-US/docs/Web/Web_Components/Using_shadow_DOM

CleanShot.2021-11-02.at.09.43.28.mp4

I also did a spot check for other stacking behavior, and it looks okay.

CleanShot.2021-11-02.at.09.46.00.mp4

I'll release a new version shortly, after looking to see if there's any other misc CSS stacking rules that should be updated.

[gwwar]

I've submitted the extension for review 🤞 that it's won't take too long. In the meantime, if it's urgent folks can clone this repository and click on "load unpacked" and point it at the checkout folder.

[gwwar]

This fix should now be available in v1.1.0 from https://chrome.google.com/webstore/detail/z-context/jigamimbjojkdgnlldajknogfgncplbh 🎉 Thanks again for the contribution @edenilan