added WFS_URL arg in RefGraph view js

SE/se-lib/Route/RefGraph.php.view.js

@@ -22,6 +22,10 @@ var _defaultWfsParams = {
 	resolve: 'all',
 	resolveDepth: 2,
 }
+if ('undefined' !== typeof WFS_URL) {
+	_defaultWfsParams['WFS_URL'] = WFS_URL
+}
+
 var _defaultVisJsOptions = {
 	nodes: {
 		shape: 'box'