style: reduce size of newsletter form

panikweb_templates/templates/home.html

@@ -17,7 +17,7 @@
 		    {% weekview %}
 
 	      <form method="post" action="{% url 'newsletter-subscribe' %}"
-		      class="big center padded marged" id="subscribe-form">
+		      class="marged" id="subscribe-form">
 	      <p>Tous les lundis, l'actualité de la semaine de Panik :</p>
 	        {% csrf_token %}
 	        {{ newsletter_form.as_table }}