Under gnome 3, you can customize the names and contents of folders/groups in the full-screen application grid by clicking on the edit button or dragging-and-dropping. You can also create new groups by dragging-and-dropping one application icon onto another.
Under Zorin all these things are impossible. You cannot change the contents or name of the “Utilities” group (the only group present) in the full-screen app grid. All dragging-and-dropping of apps into or out of a group is disallowed and there is no edit button next to the name.
How can I restore this functionality, and why was it disabled?