* @cfg {Mixed} textEl The element to render the progress text to (defaults to the progress
* bar's internal text element)
* @cfg {String} id The progress bar element's id (defaults to an auto-generated id)
* @cfg {Mixed} textEl The element to render the progress text to (defaults to the progress
* bar's internal text element)
* @cfg {String} id The progress bar element's id (defaults to an auto-generated id)