Is it possible to disable group by column until last two fields left.

[svancha]

I Have a group by columns of 5. Is it possible to disable the fields that can be checked when two of the fields are selected. Currently When there is one field left in the group by selection, it seems to be disabled.

I would like to have two of the fields in the listgrid at the minimum.

Attached is the screenshot.

Thanks in advance!!

[svancha]

Attached the screenshot