Project Storage: Bake lights dialog doesn't show button for exposing models and lights from a imported 3d node in the scene

• Create new project
• Enable cast shadows on the directionalLight
• Import a 3D model and add it to scene
• Add a cube so that it casts shadow on the imported model
• Click bake lights on 3D view toolbar

-> Lights baking setup dialog that opens should have button "Expose models and lights" for the imported 3D model, but the button is missing.