- add parameter "-package_ids to form-usages"
- let user configure "buttons" of form-usages via @table_properties
- add "button" named "no-view" to form-usages to avoid creating an
auto-link to view the content
- require per default admin permissions to view/edit a form
- added automatic form-variable "@current_url@", similar to "@current_user@"
- Page.create-new: allow to provide initial name and instance attributes
- Page.create-new: form-parameters stronger than query-parameters for provided
package_id and parent_id