A weight of 2.004 pt shows as 0.167 p in picas, the same text as the
2 pt preset. One click down on the spinner went to 2 pt and the field
did not change. The spinner now treats a preset shown with the same text
as the weight as reached, as the field's arrow keys do, so the click
goes on to 1 pt. A plain step also passes a whole-point step shown with
the same text as the weight: 2.0004 pt goes down to 1 pt.