When skinning basic FormItems like SelectItem and TextItem, consider that compound form items
like DateItem and ComboBox reuse simpler items like SelectItem and TextItem, so adding a border
to SelectItem would also apply a border to each select item within DateItem. To avoid such
side-effects, if you want to add styling to all SelectItems used in your application, you can
create an application-specific subclass like MySelectItem and apply properties there.