The source project of this merge request has been removed.
Decouple VP1 from GeoSpecialShapes and restore display of the EMEC shape
Currently, VP1 handles the "LArCustomShape". However, since a few months, this shape never appears in the GeoModel tree. Instead it has been replaced with "GeoUnidentifiedShape". This MR restores the visualization of the EMEC geometry, by handling the GeoUnidentifiedShape. Then, it no longer depends upon LArCustomShape nor upon its containing package, GeoSpecialShapes.