ADDED: Connectivity for graphic shapes on copper layers

Graphic shapes (excluding text) can now have nets when on
copper layers. Shapes behave like tracks in that they will
pick up nets from connected pads, and follow track opacity
settings.

pcbnew/plot_brditems_plotter.cpp

@@ -714,6 +714,13 @@ void BRDITEMS_PLOTTER::PlotShape( const PCB_SHAPE* aShape )
             gbr_metadata.SetApertureAttrib( GBR_APERTURE_METADATA::GBR_APERTURE_ATTRIB_ETCHEDCMP );
             gbr_metadata.SetCopper( true );
         }
+        else if( aShape->GetNetCode() > 0 )
+        {
+            gbr_metadata.SetCopper( true );
+            gbr_metadata.SetApertureAttrib( GBR_APERTURE_METADATA::GBR_APERTURE_ATTRIB_CONDUCTOR );
+            gbr_metadata.SetNetAttribType( GBR_NETLIST_METADATA::GBR_NETINFO_NET );
+            gbr_metadata.SetNetName( aShape->GetNetname() );
+        }
         else
         {
             // Graphic items (PCB_SHAPE, TEXT) having no net have the NonConductor attribute