Update Angular Version

Use a new Angular application and move files to achieve this!

dashboard/src/app/song-table/song-table.component.ts

@@ -25,7 +25,7 @@ export class SongTableComponent {
    *
    * @param event scroll event
    */
-  private onScroll(event: any) {
+  onScroll(event: any) {
     if ((window.innerHeight + window.scrollY) >= document.body.offsetHeight) {
       this.atBottom.emit();
     }