In the datagrid Captured below,
Since "Grouping By Field "CAT" was set - AND - All EXPRESSIONS Text used for Grouping will ALWAYS appear on top of the Grouped block of values,
it would be nice if the whole Reference column (CAT) could also be removed from the Block displayed.
The TITLE and all Values in this Column would be hidden and the First visible column displayed - in that case - would then be : "Designation"
We are working on fixing the "Visible Column" option in grouping. I'll update you here when its done.