GitLab

* NoticeIcon: using Dropdown instead of Popover.

* NoticeIcon: using 100% width on mobile

* New component `HeaderDropdown`

* Using PureComponent because of refs

* feat: add count prop for NoticeIconTab component.(ant-design-pro#2216)
prop count is not required.

* feat: unread notice message demo

* add new feature: click the clear button or list item to close the pop-up

* add the new property: clickClose and set the value: true

* add the new property: clearClose

* update d.ts and  .md

* add eslint-disable-line

* Add name prop for NoticeIconTab in order to support clear-by-type when using i18n.

* Fix typo