[PL/HT] HTMaterialProperties: Technical improvements.

- Set copy/move construtor as deleted.
- Set copy/move assignment as deleted.
- Finalize  class.

ProcessLib/HT/HTMaterialProperties.h

@@ -22,7 +22,7 @@ struct Parameter;
 
 namespace HT
 {
-struct HTMaterialProperties
+struct HTMaterialProperties final
 {
     HTMaterialProperties(
         MaterialLib::PorousMedium::PorousMediaProperties&&
@@ -60,6 +60,11 @@ struct HTMaterialProperties
     {
     }
 
+    HTMaterialProperties(HTMaterialProperties&&) = delete;
+    HTMaterialProperties(HTMaterialProperties const&) = delete;
+    void operator=(HTMaterialProperties&&) = delete;
+    void operator=(HTMaterialProperties const&) = delete;
+
     MaterialLib::PorousMedium::PorousMediaProperties porous_media_properties;
     ParameterLib::Parameter<double> const& density_solid;
     std::unique_ptr<MaterialLib::Fluid::FluidProperties> fluid_properties;