[ADF-2455] fix properly fall back datatable thumbnail

fix search node selector
drop down list style

lib/content-services/content-node-selector/content-node-selector-panel.component.ts

@@ -324,6 +324,20 @@ export class ContentNodeSelectorPanelComponent implements OnInit, PaginatedCompo
         return !this.showingSearchResults || this.chosenNode;
     }
 
+    /**
+     * Loads the next batch of search results
+     *
+     * @param event Pagination object
+     */
+    getNextPageOfSearch(event: Pagination): void {
+        this.infiniteScroll = true;
+        this.skipCount = event.skipCount;
+
+        if (this.searchTerm.length > 0) {
+            this.querySearch();
+        }
+    }
+
     /**
      * Selects node as chosen if it has the right permission, clears the selection otherwise
      *