如果在同一个nzLayout中使用多个nzSider, 隐藏其中一个时处理逻辑错误

[kingecg]

注意：不是用 https://ng.ant.design/issue-helper/#/zh 创建的 issue 会被立即关闭。

Case：
实现布局 左中右。

<nz-layout>
<nz-sider></nz-sider>
<nz-content></nz-content>
<nz-sider *ngIf="somecondition">
</nz-sider>
</nz-layout>

右边的sider根据一定条件存在/销毁
当右边sider被销毁时，布局错误的变成了上下结构

[zorro-bot]

Hello @kingecg, your issue has been closed because it does not conform to our issue requirements.
Please use the Issue Helper to create an issue, thank you!

你好 @kingecg，为了能够进行高效沟通，我们对 issue 有一定的格式要求，你的 issue 因为不符合要求而被自动关闭。
你可以通过 issue 助手 来创建 issue 以方便我们定位错误。谢谢配合！

[zorro-bot]

Translation of this issue:

A logic error processing if a plurality of the same nzSider nzLayout, the hidden wherein

Note: It is not a issue https://ng.ant.design/issue-helper/#/zh created will be closed immediately.

Case:
Achieve the layout right and left.
`Html <Nz-layout> <Nz-sider> </ nz-sider> <Nz-content> </ nz-content> <Nz-sider * ngIf = "somecondition"> </ Nz-sider> </ Nz-layout> `
sider the right under certain conditions, the presence / Destruction
When the right sider is destroyed, it turned into the wrong layout structure from top to bottom