Adds new button under options that replicates the return button

src/app/components/shared/header/header.component.html

@@ -404,6 +404,14 @@
         </button>
 
       </ng-container>
+      
+      <button mat-menu-item
+              *ngIf="user && router.url.endsWith('/quiz')"
+              tabindex="0"
+              (click)="goBack()">
+        <mat-icon class="header-icons">arrow_back</mat-icon>
+        <span>{{'header.back-to-questionboard' | translate}}</span>
+      </button>
 
       <button mat-menu-item
               *ngIf="user && !router.url.endsWith('/user')"