[AAE-3115] Content node selector - Ability to select multiple files (#5904)

* Ability to select multiple files

* Fix unit test

* Rename event into NodeSelected

* restrict the typo

Co-authored-by: Denys Vuika <denys.vuika@alfresco.com>

Co-authored-by: Denys Vuika <denys.vuika@alfresco.com>

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

@@ -49,6 +49,10 @@ export class ContentNodeSelectorComponent {
         this.chosenNode = nodeList;
     }
 
+    hasNodeSelected(): boolean {
+        return this.chosenNode?.length > 0;
+    }
+
     onSiteChange(siteTitle: string) {
         this.updateTitle(siteTitle);
     }