Custom FAQ block preview: skip opening parent block, go right into child block?

If you have a block with nested blocks like the FAQ block in the Cookbook, with all fields editable from the preview. How can I change it so that double-clicking on an FAQ item opens that child block right away instead of first opening the parent block? If I just remove the @dblclick="open" for the parent block, the double click doesn’t propagate to the child blocks, I still have to go into edit mode of the parent block (via the pencil icon) first.