add download file function for attachments

src/app/vault/attachments.component.html

@@ -15,7 +15,8 @@
                     <tbody>
                         <tr *ngFor="let a of cipher.attachments">
                             <td>
-                                {{a.fileName}}
+                                <a href="#" appStopClick appBlurCLick (click)="download(a)">{{a.fileName}}</a>
+                                <i class="fa fa-spinner fa-fw fa-spin text-muted" *ngIf="a.downloading"></i>
                                 <br>
                                 <small>{{a.sizeName}}</small>
                             </td>

src/app/vault/attachments.component.ts

@@ -21,6 +21,6 @@ export class AttachmentsComponent extends BaseAttachmentsComponent {
         cryptoService: CryptoService, tokenService: TokenService,
         platformUtilsService: PlatformUtilsService) {
         super(cipherService, analytics, toasterService, i18nService, cryptoService, tokenService,
-            platformUtilsService);
+            platformUtilsService, window);
     }
 }