Data file fixes for settings/welcome/ncstart

settings: never delete settings file
welcome: fix typo, remove outdated comment
ncstart: remove outdated comment

apps.json

@@ -130,9 +130,6 @@
       {"name":"setting.boot.js","url":"boot.js"},
       {"name":"setting.img","url":"settings-icon.js","evaluate":true}
     ],
-    "data": [
-      {"name":"setting.json"}
-    ],
     "sortorder" : -2
   },
   { "id": "alarm",

apps/ncstart/settings.js

@@ -1,4 +1,3 @@
-// The welcome app is special, and gets to use global settings
 (function(back) {
   let settings = require('Storage').readJSON('ncstart.json', 1)
     || require('Storage').readJSON('setting.json', 1) || {}

apps/welcome/settings.js

@@ -1,6 +1,5 @@
-// The welcome app is special, and gets to use global settings
 (function(back) {
-  let settings = require('Storage').readJSON('welcome.sjson', 1)
+  let settings = require('Storage').readJSON('welcome.json', 1)
     || require('Storage').readJSON('setting.json', 1) || {}
   E.showMenu({
     '': { 'title': 'Welcome App' },