Stanislav.
Thanks, it has sorted the order of dropdown filter menu.
However new issue raised.
If I remove row that contains value ‘a’ this value is still available for selection in dropdown filter however there is no such a row with this value therefor it should not be there.
I was expecting to have following values in dropdown filter [‘d’,’b’] not [‘a’, ‘d’, ‘b’].
Same is happening if I would add into filter value that will not exists [‘a’, ‘d’, ‘b’, ‘value that is not in grid’] then ‘value that is not in grid’ is still showing as an option in dropdown filter.
So the question is: is there a way to refresh dropdown filter options and get rid of options that are not in grid but still keep the order?