In the material.min.css of webix 7.2.0 there is the class .webix_time_header that has the follow padding value:
padding: 17px 17px 1px;
but not in the material.css file that has the value:
padding: 0 0 6px;
The ones in the material.css is correct otherwise the timepicker popup will be rendered incorrectly without the chance to click on the “Done” button