Looks like it is still a work in progress that got deployed (accidentally?).
Inspecting the element, looks like it should display a pop-over menu (named
popover-example) that contains 3 elements:
- Back to your Team (links to
https://stackexchange.com/; might be shown because this account is part of more than 1 Team)
- Account settings (
https://stackexchange.com/users/preferences/current; currently not working because there is no user preference on the network account, only works on per-site account)
- Log out (
Considering all of this, it is still unclear if the menu list is already final or not, and/or if this icon should be shown on the network topbar instead of per-site topbar in the first place.