LPS-31784 Move exportReferencedContent logic to DDM Data Handler (only copy-paste, no logic changes)
LPS-31784 Update journal data handler to use DDM
LPS-31784 Update calls from other handlers
LPS-31784 Update ddmStructure-uuid to ddm-structure-uuid, and ddmTemplate-uuid to ddm-template-uuid
LPS-31784 Rename portlet preference templateId to ddmTemplateKey because of LPS-31444
LPS-31784 Source formatting
LPS-31784 Use ddmStructurePath for var name
LPS-31784 Use ddmTemplatePath for var name
LPS-31784 Simplify name
LPS-31784 Fix very misleading name, especially since other parts of this class already use ddmTemplateKeys vs ddmTemplateIds
LPS-31784 Update dir from ddmStructure to ddm-structure
LPS-31784 Update other elements / language keys to be ddm-s* or ddm-t* and not ddmS* or ddmT*
LPS-31784 Change language key back to human name? structures-templates-and-feeds
LPS-32473 replace ... by StringPool.TRIPLE_PERIOD
LPS-32473 replace "advanced options" by "advanced selection"
LPS-32473 copy from select_site
LPS-32473 copy from asset browser
LPS-32473 support for selecting and saving any site the user can manage
LPS-32473 make method public to reuse it (no logic changes)
LPS-32473 check permissions in the backend