Allow control over whether an empty string is treated as null per UIInput,
potentially overriding the application-wide setting.
It would be helpful if a inputText field which is empty could be set as a null in
the backing bean instead of a empty String. This happens frequently with entity
bean validation on a nullable field where you either want the field to be null or
be a length of 10.
A config option globally was well as a knob on the inputText component would be