1.1.3dev: Don't show hint if user has already entered their name and/or email in Prefs. Refs #10207.

Renamed label to avoid  confusion since //Full name// not //username// is saved in Preferences.


git-svn-id: http://trac.edgewall.org/intertrac/log:/trunk@13212 af82e41b-90c4-0310-8c96-b1721e28e2e2