REPORT-103382 切换移动端自定义样式，类转换异常

designer-base/src/main/java/com/fr/design/mainframe/mobile/ui/MobileStyleDefinePane.java

@@ -91,6 +91,7 @@ public class MobileStyleDefinePane extends BasicBeanPane<MobileStyle> {
 
     @Override
     public MobileStyle updateBean() {
+        mobileStyle = Reflect.on(mobileStyleClazz).create().get();
         this.widget.setMobileStyle(mobileStyle);
         this.customBeanPane.updateBean();
         mobileStyle.setCommonCustom(customCombo.getSelectedIndex() == 1);