ProductStoreShippmentMeth doesn't have uom stuff

[Adam Heath-2]

In this entity, there are minWeight/maxWeight, minTotal/maxTotal,
minSize/maxSize.  However, there is no unit of measure attached to
those.  ProductStoreWorker.getAvailableStoreShippingMethods doesn't do
any uom stuff, so I could see this failing.

Is this correct, or does the uom stuff get applied somewhere else?