[no-issue] error image resolver mimetype should not be part of datatable (#3415)

* move error image custom logic form datatable to documentlist

* change travis

* [fix-test-log] added optional function to data row interface

* [no-issue] fixed datatable tests

* [no-issue] fixing tests

demo-shell/src/app/components/files/files.component.html

@@ -199,6 +199,7 @@
                 [sorting]="sorting"
                 [sortingMode]="sortingMode"
                 [showHeader]="showHeader"
+                [thumbnails]="thumbnails"
                 (error)="onNavigationError($event)"
                 (success)="resetError()"
                 (ready)="emitReadyEvent($event)"
@@ -477,6 +478,12 @@
             </mat-slide-toggle>
         </section>
 
+        <section>
+            <mat-slide-toggle [color]="'primary'" (click)="toggleThumbnails()" >{{'DOCUMENT_LIST.THUMBNAILS' |
+                translate}}
+            </mat-slide-toggle>
+        </section>
+
         <section>
             <mat-slide-toggle [color]="'primary'" [(ngModel)]="versioning">
                 {{'DOCUMENT_LIST.ENABLE_VERSIONING' | translate}}