树组件右键弹出操作面板，nz-dropdown-menu被树组件的ng-template包裹，右键的时会先后弹出两个框

[007GitHu]

Reproduction link

https://stackblitz.com/edit/angular-az8atm?file=src/app/app.component.ts

Steps to reproduce

<ng-template #nzTreeTemplate let-node>
<nz-dropdown-menu #menu="nzDropdownMenu">
<li nz-menu-item (click)="selectDropdown(node)">node值
<li nz-menu-item (click)="selectDropdown(node)">node值

What is expected?

树组件的支持右键弹出操作面板，nz-dropdown-menu被树组件的ng-template包裹起来，右键弹框正常

What is actually happening?

实际效果是会先后弹出两个框

Environment	Info
ng-zorro-antd	8.5.2
Browser	谷歌

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包裹起来的目的是想在右键弹出的操作面板里面获取node节点的值

[zorro-bot]

Translation of this issue:

Right panel eject operation tree component, nz-dropdown-menu will be when the box has two pop ng-template wrapped tree assembly, the right

Reproduction link

[Https://stackblitz.com/edit/angular-az8atm?file=src/app/app.component.ts](https://stackblitz.com/edit/angular-az8atm?file=src/app/app. component.ts)

Steps to reproduce

<Ng-template #nzTreeTemplate let-node>
    <Nz-dropdown-menu # menu = "nzDropdownMenu">
         <Nz-menu-item (click) = "selectDropdown (node)" li> node value </ li>
        <Nz-menu-item (click) = "selectDropdown (node)" li> node value </ li>
    </ Nz-dropdown-menu>
</ Ng-template>
   

What is expected?

Support the right tree assembly eject operation panel, nz-dropdown-menu tree assembly is wrapped ng-template, right-normal playing block

What is actually happening?

The actual effect will have two pop-up boxes

Environment	Info
Ng-zorro-antd	8.5.2
Browser	Google

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The wrapped object is to obtain the value of the right node in the node inside the pop-up control panel

[vthinkxie]

ref #3971