Advanced filtering custom styling sample does not apply custom styles.

Custom styling sample at:
https://staging.infragistics.com/products/ignite-ui-angular/angular/components/grid/advanced-filtering#demo-1

Shows no custom styling anymore. It shows the default styles.

The same sample on live shows custom styles correctly: 
https://www.infragistics.com/products/ignite-ui-angular/angular/components/grid/advanced-filtering#demo-1