Default ID as option in editFields

[priefyou]

By specifying editFields for a page, modellers can define the HTML type and ordering of the form fields in the respective edit view. However, if no primary attribute is defined, the automatically added 'id' attribute cannot be considered during modelling. Therefore, we should add a Default ID language element to allow modellers to specify an HTML type and ordering for the id, even though it is not explicitly defined as entity attribute.