update config

config/gulpConfig.js

@@ -24,7 +24,7 @@ module.exports = {
     common_css:[
         'lib/jquery-ui/jquery-ui.css',
         'lib/bootstrap/css/bootstrap.min.css',
-        'lib/bootstrap/css/bootstrap-submenu.js',
+        'lib/bootstrap/css/bootstrap-submenu.css',
         'lib/spreadjs/sheets/css/gc.spread.sheets.sc.css',
         'web/building_saas/css/main.css',
         'web/building_saas/css/custom.css',