add preferences to wallet status

lib/expressapp.js

@@ -178,6 +178,13 @@ ExpressApp.prototype.start = function(opts, cb) {
             next();
           });
         },
+        function(next) {
+          server.getPreferences({}, function(err, preferences) {
+            if (err) return next(err);
+            result.preferences = preferences;
+            next();
+          });
+        },
       ], function(err) {
         if (err) return returnError(err, res, req);
         res.json(result);