[ACA-3672] - added server order for document -list (#5899)

* [ACA-3672] - added sorting server side for document-list

* [ACA-3672] - added and fixed unit tests for backend order

* [ACA-3672] - fixed failing test

* [ACA-3672] - regenerated doc and renamed variable

Co-authored-by: Vito Albano <vitoalbano@Vitos-MacBook-Pro.local>

lib/core/data-column/data-column.component.ts

@@ -78,6 +78,10 @@ export class DataColumnComponent implements OnInit {
     @Input()
     focus: boolean = true;
 
+    /** When using server side sorting the column used by the api call where the sorting will be performed */
+    @Input()
+    sortingKey: string;
+
     ngOnInit() {
         if (!this.srTitle && this.key === '$thumbnail') {
             this.srTitle = 'Thumbnail';