`data-field=""` doesn't work with ldp:Container

data-fields="" should not select any field

it works for this:

<sib-display
  data-src="https://test-paris.happy-dev.fr/users/1/"
  data-fields=""
></sib-display>

not for this:

<sib-display
  data-src="https://test-paris.happy-dev.fr/users/"
  data-fields=""
></sib-display>