slightly improve style

core/templates/core/macros.jinja

@@ -140,7 +140,7 @@
         nb_page (str): call to a javascript function or variable returning
             the maximum number of pages to paginate
     #}
-  <nav class="pagination" x-show="{{ nb_pages }} > 1">
+  <nav class="pagination" x-show="{{ nb_pages }} > 1" x-cloak>
       {# Adding the prevent here is important, because otherwise,
       clicking on the pagination buttons could submit the picture management form
       and reload the page #}