had to change signature of validate function to get information for autorepeating through
removed entity-encoding of square brackets, as they mess up validiation (havnt found any negative effects so far)
- also used currently to supply options for predefined selectboxes (eg. select-cat), need to discuss if we want to fetch these per ajax
- new widget method run, which runs a given method on all widgets (and children) supporting it, eg. used now for validate
