When taking off ground rolling sound persists even in flight with wheels retracted.

One thing I redid today on purpose with respect to the little black lines connected to the windows in the in-flight-screen: They appear in fact when one clicks INTO the window in order to activate them. They seem to some sort of cursor waiting for some written input. I handle them right now by leaving activated the frames and cautiously klicking on the frame when trying to activate this window. If they are once there only closing the window helps.