Limit Portal variables defined in :root from affecting CMS.
The `tup-cms-react` app loads Portal's `imports-….css` globally, so any `:root` rules inside it have affect on CMS.
This is a no-op, because CMS is not using any of these variables, but it could. And their values should not be influenced by what is just for Portal.
Overview
Limit Portal variables defined in
:root
from affecting CMS.Related
Changes
tup-ui
usage of:root
to#page-portal
Testing & UI
N/A.