CoordinateTripodOverlay label placement and axis arrow

When looking directly along an axis, the label for the axis pointing towards / away from the camera is placed on top of the tripod, making it hard to read. It would be nicer if it was placed below the tripod instead. It seems this placement is avoided when rotating the view with the mouse, and the problem only occurs when manually selecting e.g. the "Left" view.

Also, it is not clear whether the arrow is pointing towards or away from the camera. Perhaps it would be good to use the standard vector notations in this case: