Current username not visible except on Profile page

[thonaj]

Issue description

After logging into s1.umbraco.io, the current username is not available without going to the Profile page from the user dropdown. In scenarios where you have more than 1 account it would be nice to be able to see who you are logged in as without navigating to the profile page. Either in the header bar, in the user dropdown or as a hover effect somewhere on the page.