add icon next to username in top toolbar

frontend/internet/projects/globalnav/src/lib/globalnav.component.html

@@ -14,6 +14,7 @@
                 class="sign-in-button"
                 [matMenuTriggerFor]="authMenu"
             >
+                <fa-icon [icon]="userIcon"></fa-icon>
                 {{userName}}
             </button>
             <mat-menu #authMenu="matMenu">

frontend/internet/projects/globalnav/src/lib/globalnav.component.ts

@@ -38,6 +38,7 @@ export class GlobalnavComponent implements OnInit {
     public menuIcon = faBars;
     public mobileQuery: MediaQueryList;
     public navigationItems: PrimaryNavItem[];
+    public userIcon = faUserCircle;
     public userName: string;
 
     constructor(private media: MediaMatcher) {