We are using telerik grid which is build dynamically. When adding GridDropDownColumn to the grid it's working without problem. But one functionality is really not OK. When user click on the item in grid to change it, drop-down opens but drop down values are already filtered to the existing values. Combo box should work in different way, as it works here: https://demos.telerik.com/aspnet-ajax/combobox/examples/overview/defaultcs.aspx. When user clicks on that drop-down and if there is any item selected, he gets all items in dropdown and NOT pre-filtered by selected value.
How should we set up that column to allow out of the box behaviour of the Filter?