add subchild class to review table rows in sidebar for styling purposes

opentech/apply/funds/templates/funds/includes/review_table_row.html

 {% for review in reviews %}
-    <tr class="{% if missing %}no-response{% endif %}">
+    <tr class="tr--subchild {% if missing %}no-response{% endif %}">
         {% if missing %}
             <td colspan="2">{{ review }}</td>
             <td>-</td>