activity: Display email addresses in bold

(imported from commit 09f6a821ac8a0dad98d69e69a411cba0af424cec)

templates/zephyr/activity.html

@@ -23,7 +23,7 @@
     <tbody>
     {% for row in rows %}
         <tr>
-        <td>{{ row.email }}</td>
+        <td><strong>{{ row.email }}</strong></td>
         <td sorttable_customkey="{{ row.get_updates_last|date:'YmdHi' }}">{{ row.get_updates_last }}</td>
         <td sorttable_customkey="{{ row.send_message_last|date:'YmdHi' }}">{{ row.send_message_last }}</td>
         {% if has_pointer %}