[ADF-2589] conditional visibility for DL/DT components (#3223)

* watch data columns and update layout if needed

* update docs

* support DataTable, docs and tests

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

@@ -119,6 +119,9 @@ export class FilesComponent implements OnInit, OnChanges, OnDestroy {
     @Input()
     disableDragArea = false;
 
+    @Input()
+    showNameColumn = true;
+
     @Output()
     documentListReady: EventEmitter<any> = new EventEmitter();