Use title class for thread titles in landing

boards/templates/boards/landing.html

@@ -22,7 +22,7 b''
                 {{ op.attachments.first.get_view|safe }}
                 {% with title=op.get_title_or_text %}
                     {% if title %}
-                        <div>{{ title }}</div>
+                        <div class="title">{{ title }}</div>
                     {% endif %}
                 {% endwith %}
                 <div>{{ op.thread.get_sections_str }}</div>