Provides a "per item" catchweight +/- setting for min/max weight.
Changes the handling of the "Minimum Weight" field in Inventory File Maintenance to be "Catchweight +/- pct." and eliminates the "Maximum Weight" field.
In the various weight-entry features of the system a non-zero "Catchweight %" value will be used to establish the working minimum and maximum weights for the item.
Where "Catchweight %" is zero for a given item the system will fall back to using the global "Catchweight %" value, if defined.