Fix designer default version

pmd-ui/src/main/java/net/sourceforge/pmd/util/fxdesigner/SourceEditorController.java

@@ -163,6 +163,8 @@ public class SourceEditorController extends AbstractController {
                     });
 
         languageVersionUIProperty = DesignerUtil.mapToggleGroupToUserData(languageToggleGroup);
+        // this will be overwritten by property restore if needed
+        languageVersionUIProperty.setValue(DesignerUtil.defaultLanguageVersion());
     }