Fix: Add CRS info of CityModel to exported CityObjects

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/CityDoctorController.java

@@ -883,6 +883,7 @@ public class CityDoctorController {
         newModel.setCityModel(new CityModel());
         newModel.addCityObject(co);
         newModel.setParsedCityGMLVersion(model.getCityGMLVersion());
+        newModel.getCityModel().setBoundedBy(model.getCityModel().getBoundedBy());
 
         FileChooser fc = new FileChooser();
         fc.getExtensionFilters().add(new ExtensionFilter("CityGML", "*.gml"));