Fix how we fetch employee history, for profile view

tailbone/views/people.py

@@ -261,7 +261,7 @@ class PeopleView(MasterView):
     def get_context_employee_history(self, employee):
         data = []
         if employee:
-            for history in sorted(employee.history, key=lambda h: h.start_date, reverse=True):
+            for history in employee.sorted_history(reverse=True):
                 data.append({
                     'uuid': history.uuid,
                     'start_date': six.text_type(history.start_date),