- improve handling for form-fields of type form_page (makes it easier to change the xowiki instance, from where the form is resolved) - better handling of nested package initialzations
- changed pretty value to omit ".." from category trees on level>1 - minor refactoring: made FormField::select and FormField::radio subclasses of the abstract class FormField::enumeration, keeping now the common methods for these classes - import/export of FormFields using category trees as source.