REPORT-138445 wms图层连接问题

修复一个逻辑问题

designer-chart/src/main/java/com/fr/van/chart/map/designer/type/WMSLayerPane.java

@@ -85,6 +85,7 @@ public class WMSLayerPane extends JPanel implements UIObserver {
                     @Override
                     protected Void doInBackground() {
                         List<String> wmsNames = MapEditService.getInstance().getWMSNames(wmsUrl.getText());
+                        list.clear();
                         for (String layer : wmsNames) {
                             list.add(new WMSLayer(layer, false));
                         }