Fix fullscreen scaling for desktops

kria-cluster-3d-demo/qml/main.qml

@@ -83,11 +83,11 @@ Item {
     Studio3D {
         id: studio3D
         width: parent.width
-        height: width * 0.375 // based on the aspect ratio of the presentation
+        height: parent.height //width * 0.375 // based on the aspect ratio of the presentation
         anchors.verticalCenter: parent.verticalCenter
 
         ViewerSettings {
-            scaleMode: ViewerSettings.ScaleModeFit
+            scaleMode: ViewerSettings.ScaleModeFill
         }
 
         Presentation {