* Sort the fields of a form descriptor by their 'weight' property. (Fields with higher weight
* are shown closer to the bottom; weight defaults to 0. Negative weight is allowed.)
* Keep order if weights are equal.
* Sort the fields of a form descriptor by their 'weight' property. (Fields with higher weight
* are shown closer to the bottom; weight defaults to 0. Negative weight is allowed.)
* Keep order if weights are equal.