无JIRA fix: pane的内存泄漏

packages/fineui/src/base/1.pane.js

@@ -158,4 +158,10 @@ export class Pane extends Widget {
         this.options.items = items || [];
         this.check();
     }
+
+    destroyed() {
+        super.destroyed();
+        Layers.remove(`${this.getName()}-loading`);
+        this._loading?.destroy();
+    }
 }