* @extends Roo.bootstrap.Button
* Bootstrap Card Uploader class - it's a button which when you add files to it, adds cards below with preview and the name...
* @cfg {Number} errorTimeout default 3000
* @extends Roo.bootstrap.Button
* Bootstrap Card Uploader class - it's a button which when you add files to it, adds cards below with preview and the name...
* @cfg {Number} errorTimeout default 3000