Pull request #7919: REPORT-65772 模板权限编辑状态切换问题-打开一张cpt，进入模板权限编辑后，再打开一张frm时，frm也有模板权限编辑框了

Merge in DESIGN/design from ~FANGLEI/design:release/11.0 to release/11.0

* commit '3dfe341cbbd81cef5abed61625f5f5fa72efbe26':
  REPORT-65772 模板权限编辑状态切换问题-打开一张cpt，进入模板权限编辑后，再打开一张frm时，frm也有模板权限编辑框了

designer-form/src/main/java/com/fr/design/mainframe/FormDesigner.java

@@ -1520,7 +1520,10 @@ public class FormDesigner extends TargetComponent<Form> implements TreeSelection
     private DesignerBaseOperate getLayoutBaseOperate(){
         FormSelection selection = this.getSelectionModel().getSelection();
         XCreator creator = selection.getSelectedCreator();
-        XLayoutContainer container = (XLayoutContainer) creator.getParent();
+        XLayoutContainer container = null;
+        if (creator != null) {
+            container = (XLayoutContainer) creator.getParent();
+        }
         if (container == null) {
             return new DefaultDesignerBaseOperate();
         }