message: Actually create nullable List properties
diff: @@ -119,7 +119,7 @@ ColKey add_column(Group& group, Table& table, Property const& property)
  }
  else if (is_array(property.type)) {
  return table.add_column_list(to_core_type(property.type & ~PropertyType::Flags),
  - property.name/*, is_nullable(property.type)*/);
  + property.name, is_nullable(property.type));
  }
  else {
  auto key = table.add_column(to_core_type(property.type), property.name, is_nullable(property.type));
  