Added support to cell customized constraints.
Minor change.
Updated FormTextFieldCell default constraints.
Allow single/multiple option selection.
Added user info row descriptor property.
Updated example controller.
Fixed bug in multiselection.
Minor change in value cell type.
Added placeholder property.
Added placeholder option to default constructor.
Added conditional navigation title assignment.
Merge commit '9d3f64c9d7d9179fbde5f4d36e17f836315b3888' from upstream