Change saved list message when not logged in

We should add text mentioning that it's only saved to the session, and change the color from green to something more concerning.

The issue does not name a file, test, or entry point. Locate the saved-list message shown when the user is not logged in, then verify the session-only wording and a more concerning color. Done means the logged-out message communicates that the list is saved only for the session and no longer uses green.

Written by the indexing model from the issue text.