crash report, "missing style", closes https://github.com/opnsense/plugins/issues/99

src/opnsense/mvc/app/views/layout_partials/base_dialog.volt

@@ -97,7 +97,7 @@ label           :   dialog label
       </tbody>
     </table>
   </div>
-  <div class="table-responsive {% if field['style'] %}{{field['style']}}{% endif %}">
+  <div class="table-responsive {% if style in field %}{{field['style']}}{% endif %}">
     <table class="table table-striped table-condensed">
         <colgroup>
             <col class="col-md-3"/>