Hide LoPS request page when not received

If the LoPS has been received we should hide the page asking the
applicants to request their LoPS as it's confusing.

app/view_objects/teacher_interface/application_form_view_object.rb

@@ -140,6 +140,7 @@ def request_further_information?
   def request_professional_standing_certificate?
     teaching_authority_provides_written_statement &&
       professional_standing_request&.requested? &&
+      !professional_standing_request&.received? &&
       (
         !requires_preliminary_check ||
           assessment&.all_preliminary_sections_passed?