Anchors labels hide points and contours

[GaetanBaehr]

when anchors label are turn on they are above the contours and points and hide them, would be nice to put them in the background or in between the fill grey and the contour/points

[justvanrossum]

Perhaps the anchor labels should be between the fill (background) and the stroke + nodes.

We need to make sure that the labels for anchors that are inside the glyph shape are still readable, therefor I think they should be in front of the fill.