I don't think I saw this posted yet.
It would be nice to be able to copy the Group By value in the desktop application.
I don't believe there is any other function associated with clicking in the group row area, so it would be nice to be able to select the text.
I.e. If I had a table view with many rows of Order Details grouped by an Order Number, it would be cool to be able to select and copy the Order Number.
Maybe this is a small quick feature that could be implemented?