QmlDesigner: Fix 3D view active split highlight color

Change-Id: I9062f4ebd67ddd849daf436b903ca471703953f9
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

src/tools/qml2puppet/mockfiles/qt6/EditView3D.qml

@@ -776,7 +776,7 @@ Item {
                 height: viewRects[activeSplit].height + (activeSplit === 0 || activeSplit === 1 ? 1 : 0)
                 width: viewRects[activeSplit].width + (activeSplit === 0 || activeSplit === 2 ? 1 : 0)
                 border.width: 1
-                border.color: "#fff600"
+                border.color: "#57B9FC"
                 color: "transparent"
             }