EDIT

ref #9520 fix TaxonNodeNaturalComparator for nodes without treeindex (should not really happen)

cleanup

ref #9520 try to remove cascade from TaxonNode.parent

cleanup

fix #8858 Improve presence/absence handling for PresenceAbsenceTerm.compareTo

cleanup

add _ to label to add the new term at the beginning of the terms list

ref #3816, ref #8858 add "undefined" to PAT vocabulary

ref #8858 ordering of terms from different vocabularies use voc.uuid as vocabulary order attribute (fix ordering of "undefined" status in E+M)

cleanup