Display credential pair keys along with credential names on the service page

[ryan-lane]

It can be difficult to track a credential key back to its credential. The credential pairs are encrypted, so we can't have a search index for this. The most common use-case here, though, is to find a credential key when you already know the service. If we show the credential pair keys along with the credential names on the service page, people will be able to find the credential resource easily.