Ng-zorro-antd: "Select with search field" shows clear button on hover when empty

[oestrogen]

Version

7.0.0-rc.3

Environment

Any

Reproduction link

https://6jrkl2.run.stackblitz.io/

Steps to reproduce

• Hover a "Select with search field" (without anything selected and with nzAlllowClear set)

• Try to click dropdown arrow icon

  What is expected?

• Dropdown arrow icon should still be visible

• Clicking dropdown arrow icon should open the select menu

  What is actually happening?

• Dropdown arrow icon is replaced with Ⓧ icon

• Clicking Ⓧ icon does nothing
  

  Other?

The same component upstream in Ant behaves as expected.

[vthinkxie]

thanks for your report!
this bug has been fixed by https://github.com/NG-ZORRO/ng-zorro-antd/pull/2741
plz try again when next version released