Set transaction contextual default property

The Set transaction contextual default property is needed at the Grid node level by de Web panel designer to enable setting contextual defaults (see Contextual defaults).

The Web panel designer lets the developer set the base transaction for grid type nodes (see Grids with base table) but has no clue if the web panel calls that transaction to insert records. Use this property to tell K2BTools that the web panel calls the transaction to insert records and that setting contextual defaults is important.