This event is fired every time a query moves the cursor from an item. This includes when the search is reset or the query is destroyed.
For a query named 'query1', the events 'on_query_item_closed', then 'on_query1_query_item_closed' are fired.
script on_questions_query_item_closed is set_column_value ('marked', current_item_index, guessed) -- guessed is a user variable end