message: Show tags sorted alphabetically and also on normally large screens
diff: </ng-container>
  <ng-container matColumnDef="tags">
  - <mat-header-cell *matHeaderCellDef fxShow fxHide.lt-xl translate>LABEL_TAGS</mat-header-cell>
  - <mat-cell *matCellDef="let challenge" fxShow fxHide.lt-xl>
  + <mat-header-cell *matHeaderCellDef fxShow fxHide.lt-lg translate>LABEL_TAGS</mat-header-cell>
  + <mat-cell *matCellDef="let challenge" fxShow fxHide.lt-lg>
  <span *ngIf="challenge.tags">
  - <mat-chip-list *ngFor="let tag of challenge.tags.split(',')">
  + <mat-chip-list *ngFor="let tag of challenge.tags.split(',').sort()">
  <mat-chip>{{tag}}</mat-chip>
  </mat-chip-list>
  </span>
  