Good day,
just a small question. Why are the lines are not being displayed ? Is it because of extended DataDriver ?
Snippet : https://webix.com/snippet/159fa089
perhaps your template is not suitable for selected type
instead of using such template, set item value in the datadriver.
https://webix.com/snippet/509152be
You need to include common.icon() into the template to display the lines: https://webix.com/snippet/b5aa5f28