Fixes #182 - Replaced display none by hidden attribute.

This change improves CSP compliancy.
Thanks Martin Lueders for the report and patch.

Author: claudep

django_comments/templates/comments/form.html

@@ -9,7 +9,7 @@
       {% if field.errors %}{{ field.errors }}{% endif %}
       <p
               {% if field.errors %} class="error"{% endif %}
-              {% if field.name == "honeypot" %} style="display:none;"{% endif %}>
+              {% if field.name == "honeypot" %}hidden{% endif %}>
         {{ field.label_tag }} {{ field }}
       </p>
     {% endif %}

django_comments/templates/comments/preview.html

@@ -27,7 +27,7 @@ <h1>{% trans "Preview your comment" %}</h1>
         {% if field.errors %}{{ field.errors }}{% endif %}
         <p
                 {% if field.errors %} class="error"{% endif %}
-                {% if field.name == "honeypot" %} style="display:none;"{% endif %}>
+                {% if field.name == "honeypot" %}hidden{% endif %}>
           {{ field.label_tag }} {{ field }}
         </p>
       {% endif %}