[ADF-2645] move the service use in the upload in the right place (#3189)

[ADF-2645] move the service use in the upload in the right place 
[ADF-2687] No message is displayed when deleting a file/folder from content action
[ADF-2714] [demo shell] Not able to download a version of a file

* add spaces tslint fix

lib/core/services/content.service.ts

@@ -17,7 +17,7 @@
 
 import { Injectable } from '@angular/core';
 import { DomSanitizer } from '@angular/platform-browser';
-import { ContentApi, MinimalNodeEntryEntity, Node } from 'alfresco-js-api';
+import { ContentApi, MinimalNodeEntryEntity, Node, NodeEntry } from 'alfresco-js-api';
 import { Observable } from 'rxjs/Observable';
 import { Subject } from 'rxjs/Subject';
 import { FolderCreatedEvent } from '../events/folder-created.event';
@@ -191,6 +191,16 @@ export class ContentService {
             .catch(err => this.handleError(err));
     }
 
+    /**
+     * Gets a Node via its node ID.
+     * @param nodeId
+     * @param opts
+     * @returns Details of the folder
+     */
+    getNode(nodeId: string, opts?: any): Observable<NodeEntry> {
+        return Observable.fromPromise(this.apiService.getInstance().nodes.getNode(nodeId, opts));
+    }
+
     /**
      * Check if the user has permissions on that node
      * @param node Node to check allowableOperations