Improve footer for mobile viewport

Author: Gabatxo1312

templates/menus/footer.html

@@ -1,5 +1,5 @@
 <div class="container text-center mt-4"> 
-  <div class="d-flex gap-3 justify-content-between">
+  <div class="d-flex flex-column flex-sm-row gap-0 gap-sm-3 justify-content-between">
     {% if let Some(user) = user %}
     </p>Logged in as {{ user|safe }}</h3>
     {% else %}