Put error flag on whole row

We’ve seen people miss errors if they’re in the right-hand columns of
the spreadsheet because people’s eyes scan down the left edge of the
table.

app/templates/components/table.html

@@ -73,9 +73,9 @@
   </th>
 {%- endmacro %}
 
-{% macro index_field(text) -%}
+{% macro index_field(text=None) -%}
   <td class="table-field-index">
-    <span>{{ text }}</span>
+    {{ text if text != None else caller()  }}
   </td>
 {%- endmacro %}