Allow the user to switch between visualizing original or processed volumes in 3D scene after slicing using SLA printers

src/slic3r/GUI/GUI_ObjectList.cpp

@@ -747,6 +747,10 @@ void ObjectList::selection_changed()
                 wxGetApp().obj_layers()->update_scene_from_editor_selection();
             }
         }
+        else if (type & itVolume) {
+            if (printer_technology() == ptSLA)
+                wxGetApp().plater()->canvas3D()->set_sla_view_type(GLCanvas3D::ESLAViewType::Original);
+        }
     }
 
     part_selection_changed();