undo always visible. now based on study_subject_columns

smash/web/api_views/subject.py

@@ -93,12 +93,12 @@ def get_subject_columns(request, subject_list_type):
         add_column(result, 
                   'Virus {} RT-PCR'.format(virus_visit_number), 
                   'virus_test_{}'.format(one_based_idx), #always starts in 1
-                  None, #always visible
+                  study_subject_columns,
                   'yes_no_null_inconclusive_filter', study.columns)
         add_column(result, 
                    "Visit {} RT-PCR date".format(virus_visit_number), 
                    "virus_test_{}_updated".format(one_based_idx), 
-                   None, #always visible
+                   study_subject_columns,
                    "virus_test_date", study.columns)
 
     add_column(result, "Type", "type", study_subject_columns, "type_filter", study.columns)