message: fixed missing failed job icon
diff: <mdl-list-item>
  <mdl-list-item-primary-content>
  - <mdl-icon *ngIf="notification.status === notificationStatus.Finished" mdl-list-item-avatar>done</mdl-icon>
  - <mdl-spinner *ngIf="notification.status === notificationStatus.Pending" mdl-list-item-avatar single-color active></mdl-spinner>
  + <ng-container [ngSwitch]="notification.status">
  + <mdl-icon
  + *ngSwitchCase="notificationStatus.Finished"
  + mdl-list-item-avatar
  + >
  + done
  + </mdl-icon>
  + <mdl-spinner
  + *ngSwitchCase="notificationStatus.Pending"
  + mdl-list-item-avatar
  + single-color
  + active
  + ></mdl-spinner>
  + <mdl-icon
  + *ngSwitchCase="notificationStatus.Failed"
  + mdl-list-item-avatar
  + >
  + close
  + </mdl-icon>
  + </ng-container>
  <span>{{ notification.message }}</span>
  </mdl-list-item-primary-content>
  <mdl-icon class="close" *ngIf="notification.status !== notificationStatus.Pending" (click)="remove()">close</mdl-icon>
  