Add Batch commands to the HTML5 Viewer.

In the Silverlight Viewer there was the possibility to use Batch commands in the toolbar and I want menu.
This option is not available for the HTML5 Viewer at the moment. The only option to configure an I Want To Menu item to run batch commands, is to edit each of the Desktop.json.js, Tablet.json.js, and Handheld.json.js files manually.
 
It would be great if this functionality could be added