implements a property handler for use with an ::com::sun::star::inspection::ObjectInspector
which is able to provide properties to bind a form component to a spreadsheet cell.
The handler expects a value named "ContextDocument" in the context in which it is created.
That is, the ::com::sun::star::uno::XComponentContext used for creating the
CellBindingPropertyHandler is examined for a value with this name. If the object in this
value denotes a spreadsheet document (indicated by supporting the ::com::sun::star::sheet::XSpreadsheetDocument
interface), this document is used to create the ::com::sun::star::form::binding::ValueBindings
to bind the inspected object to cells in this document.
