Incorrect display names in target folder tree in document translation dialog

Reproduction:

• set up a translated folder linked to an existing one
• open a document for which no translation exists yet
  e.g. https://cms.demo.onehippo.com/content/path/content/documents/hippogogreen/about/terms--conditions/terms--conditions
• add a translation in the target language (French in above example)

Expected:
Target tree shows correct display names of the folders

Actual:
Target tree shows all folders having the display name of the deepest folder

See

Code hint
There seems to be a bug in org.hippoecm.frontend.translation.workflow.TranslationWorkflowPlugin#populateFolders