Modifier keys being used with a dropzone attribute

1. Drag the orange square over the blue square
2. Press the relevant modifier keys for your platform to request a "move" drop effect (eg. Shift on Windows/Unix/Linux, Command on Mac)
3. Continue dragging over the pink square
4. If supported by the platform, the mouse cursor should show that a "link" drop effect will be used
5. Release the drag, then the keys
6. Fail if no new text appears above this list