Even if you are planning to show pages as a tree structure, the Sitemap panel should be renamed. Sitemaps are very different things. I guess the icon should also be changed at the same time. The position of the project name coud be improved as well.
Something like this?

Add a new demo

Following up on the analysis done in #798, we should update related full page demos to eliminate use of card backgrounds. Demos affected include:

Data List
Table
Forms
Master-detail