Per T295085, because of the checkbox hack, these menu would stay open
when navigating back to a page.
Bug: T295085
Change-Id: Ief9523030384b4bcaa00379988e2042b4d177dcc
* In legacy Vector, menu items are now wrapped with spans. This
consistency in HTML is required for splitting Vector into two
different skins.
* Vector's portlet link items now support icons
Bug: T289163
Bug: T291722
Change-Id: I4464888983ac8b8b5f971e0c679dbeda09a61be5
* Don't reveal the menu on hover
* Don't flip the dropdown arrow when open
* Menus close when clicked outside
Bug: T275681
Change-Id: I36f5c46422725a935c962be3194fd37bde1fa769