Show Label over ID in Edit Vocabulary Entry window

1. In Studio, create a hierarchical vocabulary with several parent/child entries. Let parent IDs differ significantly from their Labels. Save project and reload Nuxeo instance.
2. In Web UI, navigate to Administration > Vocabularies. Select and view created Vocabulary from step 1.
3. Click the pencil icon on a child entry to open Edit Vocabulary Entry window.
4. Click the "Select a Parent" dropdown to view entries. Entries are displayed by their ID fields, as opposed to their Labels.

(Note: end user accessibility issue mainly arises when vocabulary entries have auto-generated or unrelated ID values resulting from an entry creation process. Please see attached pictures for an example scenario)