This workflow is very similar to the certify workflow (T6046: Kleopatra: Make certifying certificates accessible).
Issues:
- Fingerprint is inaccessible (finding [3] in the Prüfbericht Barrierefreiheit GnuPG Kleopatra 3.1.20.3)
- "Certification key" label not associated with combo box
- No accessible feedback when checking/unchecking user ID