Extension without "Show in public phonebook"-flag not shown in helpdesk user view

[LostInWeb]

Describe the bug
You cannot see the extensions without "Show in public phonebook"-flag in the user extenstions list view. You can see all extensions in the extensions list but not anymore in the user extensions list. You want to see the view because of the key-icon that you can see the account details/token. It would be helpful as Helpdesk Angel.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'https://guru3.eventphone.de/extension/list?q=&order=extension - the user needs to have at least one extension with deactivated "Show in public phonebook" flag
2. You see at least one extension which should have the shield-icon and not the eye-icon in the extensions list
3. Click on "Show all user extension" in the user column
4. You do not see the extension without the "Show in public phonebook"-flag on the site https://guru3.eventphone.de/extension/user/

Expected behavior
With the extended user rights "Helpdesk Angel" you should see the user extension without "Show in public phonebook"-flag in the extensions list (screenshot 1) and in the user extensions view (screenshot 2). So that you are able to see the key-icon for the account details.

Screenshots