up styles, handle owner of products on controllers

templates/serie_festival/_delete_form.html.twig

@@ -1,4 +1,7 @@
 <form method="post" action="{{ path('app_serie_festival_delete', {'id': serie_festival.id}) }}" onsubmit="return confirm('Are you sure you want to delete this item?');">
     <input type="hidden" name="_token" value="{{ csrf_token('delete' ~ serie_festival.id) }}">
-    <button class="btn">Delete</button>
+    <button class="btn btn-danger delete-button">
+        <i class="fas fa-trash"></i>
+        Delete
+    </button>
 </form>