adjust mltext-form-validator default language handling
* test if we have default lanuage from user input of form element input
* test if text of default language is set (and not empty)
* adjust forms to set defaultLanuage
Make dynamic generated answer item form element available to getValues()
* adjust edit.js to get better element names
* create isValid, to iterate through input data, create item elements and set value to those elements
* adjust setDefaults: don't create itemrows if they are already present (if we have subforms)