Inconsistent use of username when sharing an address book

[ghost]

There is an inconsistency between calendar and contacts app when sharing a calendar or address book. In the Calendar app the full name (Bill Gates) of the person you share to is shown. However in Contact app, only the user name (bgates) is visible. I think that the full real name should be shown and not user names.

[nextcloud-bot]

GitMate.io thinks possibly related issues are #422 (read-only view broken in shared address books), #64 (Address book data lost when any user receiving a share is deleted), #171 (Add possibility to create virtual address book), #494 (disable shared address book does not work), and #556 (Search/Create Contacts/Address Book not possible).