Tweak embed URL

Author: Mark Jessop

embed-preview.html

@@ -72,7 +72,7 @@
     params += "&hidelist=" + ($("#opt_list").prop("checked") ? 0 : 1);
     params += "&hidegraph=" + ($("#opt_graph").prop("checked") ? 0 : 1);
     params += "&expandgraph=" + ($("#opt_graph_open").prop("checked") ? 1 : 0);
-    params += "&q=" + encodeURIComponent($("#opt_filter").val());
+    params += "#!mt=Mapnik&q=" + encodeURIComponent($("#opt_filter").val());
 
     code = code.replace("&preview=1", params);