Release v4.78.1

A navigation item or toolbar button that names its icon bare (item warehouse ... icon box, as Screenplay writes it) is drawn from the built-in icon library instead of leaving a blank tile (Cratis/StudioIssues#1011).

Fixed

• NavigationRegionView treats a bare icon name as a key of Cratis.Icons.Lucide (the library the built-in icons come from), so the compact and slim rails and the application toolbar buttons of a Screenplay-made application show their icon instead of an empty box. A qualified reference (library#key) is read as before, and an item with no icon stays marked data-scene-iconless.