I don't see mention anywhere of the removal of the Hidden Wire feature but no matter what I do I no longer see the Hidden Wire option is the Shading Panel of the Properties Shelf (N). Does anyone know where it is or how to get it working? I would like to filter out the backfacing polygons while retopologizing.
Here you have two pictures of the torus in Edit Mode. Note the button I've pointed out with the mouse. Is that what you are looking for? Or are you looking for "hidden wire" checkbox on the properties panel, which usually shows on the right side of 3d view? In solid mode, there it is.