improve robustness of deep_copy methodsince so far, we do not require that an empty ordered composite has allwaysthe children variable set (but maybe we should), don't assume it is alwaysthere
Fix overquoting resulting in batch message key editorThis was caused by the now stricter quoting applied to ad_form, which is used under the hood to produce this UI
- fix collateral damage from earlier submissions download change (error: can't read "__form_fields")- improve styling (many thanks to Monika Andergassen and Stephan Adelsberger) for composite questions in 2-col layout