[Feature request] Add display name as placeholder

[Nils160988]

Suggestion to also add an option for the owner's/actor's display name, not only the owner's/actor's user id (%o and %a). Sometimes, the user-ids are rather technical and not suitable to reference in a script.

[blizzz]

Sounds reasonable, and should not be hard to implement I think. If there are any takers for implementing it.

[ER-EPR]

I also would like to use a display name as placeholder, because of the LDAP users use GUID by default as user ID, and it's hard to manipulate.
External storage setting has a $home placeholder which can be set in LDAP settings. I currently using it to mount external SMB shares.