silverstripe-elemental: break cascading publishing / owns

elementalownsreset.yml

# ==================================================================================
# Do not automatically publish all the individual elements when publishing the page
# Allow published and unpublished items on a page
#
# see:
# Disable Cascade-publishing of Element in ElementalArea
# https://github.com/dnadesign/silverstripe-elemental/issues/681
# or:
# QUESTION - On Page save&publish, it publishes all elements...
# https://github.com/dnadesign/silverstripe-elemental/issues/205
# ==================================================================================

---
Name: elementalownsreset
After: elemental
---
DNADesign\Elemental\Models\ElementalArea:
  owns: null

---
Name: elementalowns
After: #elementalownsreset
---
DNADesign\Elemental\Models\ElementalArea:
  owns: []