[agenda] Fix patient display_name missing on periodic event title on periodic events page.

Since commit e90f4c7328 the patient
    display name is not saved in the event title field anymore.

    Appointment building set event title with patient display_name but when
    an event is displayed without using appointement building step, the
    event type should be tested and if it is 1, event.patient.display_name
    must be used instead of event.title.

calebasse/agenda/templates/agenda/periodic-events.html

@@ -86,7 +86,7 @@
         <span>{% if event.patient %}Rendez-vous patient{% else %}Évènement{% endif %}: {{ event.recurrence_description|lower }}</span>
          —
         <span class="hour">{{ event.start_datetime.time }}</span>
-        {% if event.title %} — {{ event.title }} {% endif %}
+        {% if event.patient %} — {{ event.patient.display_name }} {% else %}{% if event.title %} — {{ event.title }} {% endif %}{% endif %}
         {% if event.patient.paper_id %} — {{ event.patient.paper_id }} {% endif %}
         {% if event.length %} — {{ event.length }} min {% endif %}
         {% if event.workers_initial %} — {{ event.workers_initial }} {% endif %}