* fix warning -Wunused-variable
* fix warning -Wreorder-ctor
* fix warning -Wunused-but-set-variable
* fix uic warning for DlgDisplayProperties.ui
* rename the target MateriaTestLib ALL (note the typo and the already existing MaterialTestLib ALL) to MaterialTest ALL
drop the hard dependency to the Part module: The document is checked for a property ShapeMaterial of type Materials::PropertyMaterial.
An alternative could be to cast to GeoFeature and use the methods getMaterialAppearance() and setMaterialAppearance()