Remove display of journalist username from replies in source interface
Remove display of journalist username from replies in source interface

In 413e8874c9dbe665a2de28bdcc4211ea7185a05c in #1534 we added the
display of journalist usernames in replies shown to sources in order
to improve source UX. However, we have decided that this is a change we
want to push until post-0.4, so we are going to change this back for now..

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