CC-2993: Playlist Builder: add "View on SoundCloud" option on the menu

- fixed
- extra fix: handles the case when username or password is empty

airtime_mvc/public/js/airtime/library/library.js

@@ -56,6 +56,10 @@ function confirmDeletePlaylist(params){
     }
 }
 
+function openFileOnSoundCloud(link){
+	window.open(link)
+}
+
 function checkImportStatus(){
     $.getJSON('/Preference/is-import-in-progress', function(data){
         var div = $('#import_status');