cascader tigger 为 hover 且开启 nzChangeOnSelect 时，hover 父级选项时会触发选中事件

[shuizhongxiong]

Version

1.3.0

Environment

chrome

Reproduction link

https://stackblitz.com/edit/ng-zorro-antd-cascader?embed=1&file=src/app/app.component.ts

Steps to reproduce

What is expected?

当同时使用 [nzExpandTrigger]="'hover'" 及 [nzChangeOnSelect]="true" 配置时，鼠标滑过父级选项时展开次级菜单，鼠标点击父级选项时才会触发 ngModelChange 事件

What is actually happening?

当同时使用 [nzExpandTrigger]="'hover'" 及 [nzChangeOnSelect]="true" 配置时，鼠标滑过父级选项时会触发 ngModelChange 事件。

Other?

实际业务场景是有一个行业列表，一级行业下面又有二级行业，希望鼠标滑过左侧一级行业时展开右侧二级行业，点击可以选中一级行业或是二级行业，同时隐藏列表。

[wzhudev]

@shuizhongxiong Thanks for your feedback. Is this what you expect? Then, we will fix that soon!

[wzhudev]

Hint for fixing this issue:

We already have code base for this. Just need to find the correct method and change some boolean values...

[shuizhongxiong]

@wendzhue Yes, this is what I expected.Thank you very much for fixing it!

[wzhudev]

@shuizhongxiong Are you interested in fixing this? Any pr is welcome!

[shuizhongxiong]

@wendzhue Ok, let me try it.

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