如果主动关闭 视图调试窗口，应该释放对视图树的引用

AnimationEntry1 子视图的释放在控制台不能输出

## 描述

## Hummer version:

## 复现步骤

## 预期结果

```bash
class AnimationEntry1 extends View {
view: View;
constructor() {
super();
this.style = {
width: 200,
height: 200,
backgroundColor: '#aa0044'
};
this.view = new View();
this.view.style = {
width: 100,
height: 100,
backgroundColor: '#00FF00'
}
this.appendChild(this.view);
}
}

class RootView extends View {
listViews:Array = new Array()

constructor() {
super();
this.style = {
width: '100%',
height: '100%',
backgroundColor: "#FF0000",
}
for (let index = 0; index <3; index++) {
const element = new AnimationEntry1();
this.listViews.push(element);
this.appendChild(element);
}
this.addEventListener('tap', ()=> {
while(this.listViews.length > 0) {
this.listViews.pop();
}
this.removeAll();
console.log("AnimationEntry 点击了");
});
}
}
Hummer.render(new RootView());
```