KERNEL-16950 fix: options中对象不会被释放

packages/fineui/src/core/4.widget.js

@@ -874,7 +874,7 @@ export class Widget extends OB {
         this._assetMounted();
         this.__destroy();
         this.fireEvent(Events.UNMOUNT);
-        this._purgeRef(); // 子组件unmount ref置为null了，父组件拿不到ref，导致报错
+        // this._purgeRef(); // 子组件unmount ref置为null了，父组件拿不到ref，导致报错
         this.purgeListeners();
     }
 
@@ -959,6 +959,7 @@ export class Widget extends OB {
         this.fireEvent(Events.DESTROY);
         this._purgeRef();
         this.purgeListeners();
+        this.options = {};
     }
 }