Add a 'next' hidden field to allow form to store redirection url

apps/common/templates/generic_form_subtemplate.html

@@ -31,6 +31,10 @@
             {% csrf_token %}
         {% endif %}
         
+        {% if next %}
+            <input name="next" type="hidden" value="{{ next }}" />
+        {% endif %}          
+
         {% for hidden_field in hidden_fields %}
            {{ hidden_field.as_hidden }}
         {% endfor %}