ftr: small changes after the review

TRACEFOSS-893

Author: ds-ext-dskrzypczak

src/app/modules/core/layout/header/user-navigation/user-menu.component.html

@@ -30,7 +30,7 @@
     </div>
     <div
       *ngIf="this.isExpanded"
-      [class.fade-in]="this.isExpanded"
+      [class.fade-in]="isExpanded"
       class="user-menu-items-container"
       role="menu"
       aria-orientation="vertical"