xF2 Add-on ACP - top logout button, with user name 1.0.0 1.0.0

In XF2.1 ACP the logout option is bottom left and not always visible.

Also if you use different super admin/admin/moderator accounts it's not obvious under which account you are logged onto the ACP.

This add-on places a logout button top right in the ACP page header and includes the current username so that you can see which account you are using.