Example "oneOf (in array)": Expandable table rows with delete button

[hupf]

With the vanilla renderer, an empty table with a plus button that does not work is rendered.

With the Material renderer, a table with expandable rows that contain the form, and a delete button on each row, is rendered:

With our Spectrum renderer we directly render the forms vertically, without the possibility to delete entries:

Should we add delete buttons? Should the forms be collapsable? Should we use a table layout?

[mburri]

We should not use tables. We create a custom component (check out the group component for inspiration) and add a header toolbar with controls (delete, collapse icon)

[mburri]

fixed by #85