Next/previous project navigation in Project window in portfolio

being able to navigate from project to project without closing the project window view in portfolios would be a nice addition

What is the difference in a portfolio vs. Favorite projects?

we use portfolio to manage listes of projects, having a high level view is useful, but then opening the project like in the screen capture, it would be a great improvement to be able to switch between project with a prev/next command (or with arrow keys)