Fixed 'menu.form.stepform.stepform' not found in locale error (#2684)

This was caused by extra name in router.config.js.

'/form/step-form' is a pure redirect route and shouldn't have name,
like other redirect routes

config/router.config.js

@@ -60,7 +60,6 @@ export default [
             routes: [
               {
                 path: '/form/step-form',
-                name: 'stepform',
                 redirect: '/form/step-form/info',
               },
               {