<tr *ngFor="let documentFile of foundedDocumentFiles; index as i; let last = last">
    <td>
        <mat-form-field style="max-width:40px;">
           <mat-select>
               <mat-option *ngFor="let documentFileVersion of documentFile.documentFileVersions" [value]="documentFileVersion">
                           {{documentFileVersion.version.substr(8)}} - {{documentFileVersion.uploadTime}}
               </mat-option>
           </mat-select>
        </mat-form-field>
    </td>
    <td>
        <mat-icon class="icon-hover" (click)="createPreview(documentFile, documentFileVersion)">airplay</mat-icon>
    </td>

<div>
  <mat-select [(ngModel)]="selected">
        <mat-option *ngFor="let documentFileVersion of documentFile.documentFileVersions" [value]="documentFileVersion">
          {{documentFileVersion.version.substr(8)}} - {{documentFileVersion.uploadTime}}
        </mat-option>
  </mat-select>
</div>