Extended data on units of measurement in Product and ChequeSale

In the V9Preview2 API, the IProduct , the MeasuringUnitName property has been replaced with the MeasuringUnit of type IMeasuringUnit, which stores more information.

The ChequeSale has been added the property MeasuringUnit of type MeasuringUnitInfo. This property can be modified by plugins and therefore does not have an Id field to avoid confusion and not associate it with the actual MeasureUnit.