Ability to turn the sorting off for a clicked column in GridView with multisort

[PowerGamer1]

When the GridView is configured with Sort object having enableMultiSort property set to true there is no way for the user to disable/turn off sorting by one of the GridView columns by clicking that column header.

I.e. currently each click by column header changes the sort direction like this: asc -> desc -> asc -> desc .... Should be: asc -> desc -> off -> asc -> desc -> off ... (unless this is the last column in GridView currently sorted by).