Add display of user role

[oasis4he]

As a user with multiple accounts that have different permissions as determined by role(s), I want to be able to verify visually the role(s) of the current account.

When I look at the top-right corner of the GUI (just to the right of the "Login" button), I see my role(s) displayed in text under the account_user icon (https://material.io/resources/icons/?search=account&icon=account_circle&style=baseline).