REPORT-75752 兼容下旧插件

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

@@ -76,7 +76,13 @@ public class FormElementCasePaneDelegate extends ElementCasePane<FormElementCase
         if (!(template instanceof JDashboard)) {
             return new Rectangle();
         }
+        try {
             return ((JDashboard)template).getElementCaseRectangle((FormElementCase)elementCase);
+        } catch (Throwable e) {
+            // 兼容旧插件
+            return new Rectangle();
+        }
+
     }