Custom error label styles work for 'required'

When using the default 'required' error message, the class "labelError" is added when the required field is empty. However, when the default 'required' is replaced by a custom error message, a UI error was seen because the class "labelError" was not added when the field was empty. This was traced to an error in the non-template to template code transform, and has been resolved by updating webwb_pzpega_ui_dlcelltemplate_js to add the labelError class based on the presence of an error message.