added signups to forms listing

assets/js/src/forms/list.jsx

@@ -15,6 +15,10 @@ const columns = [
     name: 'segments',
     label: MailPoet.I18n.t('segments')
   },
+  {
+    name: 'signups',
+    label: MailPoet.I18n.t('signups')
+  },
   {
     name: 'created_at',
     label: MailPoet.I18n.t('createdOn'),
@@ -149,6 +153,9 @@ const FormList = React.createClass({
         <td className="column-format" data-colname={MailPoet.I18n.t('segments')}>
           { segments }
         </td>
+        <td className="column-format" data-colname={MailPoet.I18n.t('signups')}>
+          { form.signups }
+        </td>
         <td className="column-date" data-colname={MailPoet.I18n.t('createdOn')}>
           <abbr>{ MailPoet.Date.format(form.created_at) }</abbr>
         </td>