使用OnPush策略的组件里，nz-modal关闭后页面失去焦点 #2643

Version

7.0.0-rc.1

Environment

ng-zorro-antd 7.0.0-rc.1

Reproduction link

https://stackblitz.com/edit/ng-zorro-antd-start-2dcrhp

Steps to reproduce

1.点击Show Modal按钮 2.关闭模态框 页面没有焦点

What is expected?

关闭模态框之后页面焦点与步骤1相同

What is actually happening?

页面没有焦点，得额外点击一次页面才能继续操作

Other?

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