If True (the default), the rightmost column will be clipped if the control or split is not wide enough to accommodate the entire column.
If False, the rightmost column will not be clipped while other columns are visible. In this case, the rightmost column must be scrolled into view as the only visible column in the control or split.
If a control contains multiple splits, then setting its PartialRightColumn property has the same effect as setting the PartialRightColumn property of each split individually.
