I want the user to be able to insert a new item in the combobox (via the underlying TextBoxEditor).
When entered, the user should see the newly added item as selected in the combobox.
I'm probably missing an event or not making the add/set DataSource at the good place.
I'm doing everything in the CellEndEdit event handler of the grid.
Reproduce: double-click on "Type 1", type any text and change the column.
If you re-open the content of the combo, the new item is there