Richselect/Combobox down arrow in datatable.

Is it possible to display the down arrow button for richselect and combobox editors in a datatable?
Such as the button on: http://webix.com/snippet/edc47fe9

The main concern is that in a datatable, the cells that are richselects or comboboxes are not marked with the down arrow button, and users would like to visually see that these cells are dropdowns.

You can alter view of the cell through templates

http://webix.com/snippet/56d94e7b