Press shouldn't use contact view from journal

[mauromsl]

Is your feature request related to a problem? Please describe.
The press contact view is using journal.views.contact.
This makes sense, since the logic is the same regardless of the site type, but it is not obvious from the view that it is being used by the press which has led to #1719

Describe the solution you'd like
Move the shared logic to core, since it will be used by all types of sites . Then we can have wrapper views on journal/press with the appropriate decorators.