fix(cdk:popper): popper shouldn't update if reference is display none #1653
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PR Checklist
Please check if your PR fulfills the following requirements:
What is the current behavior
当 reference 为dispaly:none 隐藏时,虽然位置不会更新,但箭头位置和placement还是会更新,导致隐藏场景下显示不正常
What is the new behavior?
在reference 为 display:none时,不再更新Placement以及arrow位置
Other information
隐藏时不更新是为了解决例如reference是hover才显示的场景