Two actions "Add this page as a quick link" and "Manage my quick links" in the user menu. In lino.modlib.dashboard.models a new model QuickLink.

The challenge will be how to represent quicklinks as a str. Shouldn't we generalize the concept and tidy up our code? Compare ar.get_permalink(), Site.get_dashboard_items(), Site.get_quicklink_items(), lino.modlib.userprefs, lino.modlib.dashboard...