It would be nice to be able to organize the content of dropdown list in categories, link car models organized by brand or cities organized by state or country.
Yes, functionality like the optgroup in standard HTML dropdowns would be fantastic
Yes, group by in Comboboxes and DropdownLists is essential. We need this feature to migrate from jQuery Kendo to angular 2 Kendo
Some sort of grouping template is really needed. I'd love to be able to put simple headers or even PanelBars for each item group.
Yes, it would be great to able to combine the groupBy from kendo-data-query with the DropdownList