New collapsible lists within a form

New collapsible lists within a form

The new trick in v1.2.0 to create collapsible lists works well except that it doesn't inset properly (at all in fact) when used within a fieldcontain.

Please advise how to get this sort of layout:


Label:          New Collapsible list

All the examples show the old, no markup type lists or use "selects" which are not lists (UL,OL etc)