As a basic root attribute of kanban, default_group_by can specify the kanban group.
It seems like that there is no way to set the order of the "group" (not the data records in a group).
As a result, a "none" group displays on the top of the kanban groups if there are some records with the "default_group_by" field value is null.
How can I make the "none" group display in the end of the kanban groups?
till now , no ,not yet