Fix problème de cache dans le SAS & améliore le CSS du SAS

Co-authored-by: Bartuccio Antoine <klmp200@users.noreply.github.com>

sas/templates/sas/album.jinja

@@ -88,7 +88,7 @@
                 {% if p.can_be_viewed_by(user) %}
                     <a href="{{ url('sas:picture', picture_id=p.id) }}#pict">
                         <div
-                            class="photo"
+                            class="photo {% if p.is_vertical %}vertical{% endif %}"
                             style="background-image: url('{{ p.get_download_thumb_url() }}')"
                         >
                             {% if not p.is_moderated %}

sas/templates/sas/picture.jinja

@@ -38,7 +38,7 @@
         <h3>{{ picture.get_display_name() }}</h3>
         <h4>{{ picture.parent.children.filter(id__lte=picture.id).count() }} / {{ picture.parent.children.count() }}</h4>
     </div>
-
+    <br>
 
     {% if not picture.is_moderated %}
         {% set next = picture.get_next() %}