Server should provide logged-in WebID and its label(s) to user

@tallted: " *Originally posted by @TallTed in #869*This does not appear to show the user their logged in WebID, nor any label associated with that WebID. I submit that both of these must be available – not least because I may have the same label on multiple WebIDs, but only want to associate one WebID with some activity or data."

@dmitrizagidulin:" Can you explain more about the labels? (Their use with WebIDs is not something we currently do.)
What are you using them for, what’s the format, etc?"

@tallted: " A WebID URI is typically horribly user unfriendly, as has been discussed a lot in regards to typing that string into login boxes.

Alice Jones should not see, for instance, https://blah.example.com/stuff/things/people/userid/alicejones#this as the logged-in-user – they should see Alice Jones (which should be anchored with the URI, as here).

It may be desirable to also have this display include the IdP’s label, as

Alice Jones (blah.example.com)

or even

Alice Jones (blah.example.com)

(where the IdP is separately anchored)."