We use the Flygrid.NET in our product and I am trying to get icons (in my case, severity indicators) into a column of the table. These icons show up and are working fine, except that the droplist filter at the top does not show the icons when the user wants to filter. It shows white boxes with a big red X in it plus the integer that I use to indicate the icons in the column (I attached the screenshot). The column type is DropDownListColumnWithImages.

Anyone know how to get the icons used in the columns to be used in the droplist filter?