The built in commands and the template cannot be used together in the configuration as the template will override them. The solution is to directly include the command mark up in the template. In the current case it would be
"k-button k-button-icontext k-grid-excel"
></span>Export to Excel</a>
I wish you a great day!
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.