Modal包含表单时，反馈图标存在bug

[michaelzx]

Reproduction link

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

Steps to reproduce

1.点击按钮：打开窗口
2.不输入任何信息，点击：OK
3.点击：Cancel

What is expected?

隐藏Modal的时候，反馈图标应该一起消失

What is actually happening?

隐藏Modal的时候，反馈图标没有消失

Environment	Info
ng-zorro-antd	7.2.0
Browser	Chrome

[ng-zorro-bot]

Translation of this issue:

---

Modal There is a bug in the feedback icon when the form is included

Reproduction link

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

Steps to reproduce

1. Click the button: open the window
2. Do not enter any information, click: OK
3. Click: Cancel

What is expected?

When hiding Modal, the feedback icon should disappear together

What is actually happening?

Feedback icon does not disappear when hiding Modal

Environment	Info
ng-zorro-antd	7.2.0
Browser	Chrome

[michaelzx]

7.0.0-rc.3中Modal的隐藏方式是display:none，7.2.0中是visibility:hidden

但表单中的.has-error.has-feedback样式的visibility:visible，这样应该是会有冲突的

[hsuanxyz]

更新你的反馈，与 #3245 所修复的是同一个问题