QHeaderView drag too sensitive

Users click on a header to sort by that heading, however some users inevitably move the mouse by a pixel or so during the click.

QHeaderView treats a mouse press + move + mouse release as a drag - even if that move is a single pixel. To the user it seems as if they have clicked on the column to sort but nothing at all happened.

Please have some minimum time that the button has to be held for, or a minimum distance that the drag has to be for, in order for the drag to be recognised.