message: fix(demo-sidebar): remove list duplicate from sidebar
diff: [routerLinkActiveOptions]="{exact: true}">
  <a routerLink="/{{route.path}}">{{route.data[0]}}</a>
  </li>
  - <li *ngFor="let route of routes | slice:2 | SearchFilter:search.text"
  - [routerLinkActive]="['active']"
  - [routerLinkActiveOptions]="{exact: true}">
  - <a routerLink="/{{route.path}}">{{route.data[0]}}</a>
  - </li>
  </ul>
  </div>
  </div>
  