Bugfix: Initialize PagePublicationFields on Pages Table

On the Sitemap and on the Edit page, `Alchemy::PagePublicationFields` is
initialized. On the table, it isn't, leading to behavior where an admin cannot
un-publish or publish a page from the pages table.

app/views/alchemy/admin/pages/_table.html.erb

@@ -25,3 +25,9 @@
     <%= render partial: "table_row", collection: @pages, as: "page" %>
   </tbody>
 </table>
+
+<script type="text/javascript">
+  $(function() {
+    Alchemy.PagePublicationFields();
+  });
+</script>