update: add policy to update apps separately from platform

dashboard/public/translation/zh_Hans.json

@@ -534,12 +534,9 @@
             "stopUpdateAction": "停止更新"
         },
         "updateScheduleDialog": {
-            "title": "配置自动更新时间表",
             "disableCheckbox": "停用自动更新",
             "enableCheckbox": "启用自动更新",
             "selectOne": "选择至少一个日期和时间",
-            "days": "星期",
-            "hours": "小时",
             "description": "选择检查平台和应用更新的日子和时间。请注意这个时间不要和 <a href=\"/#/backups\">备份时间</a> 冲突。"
         },
         "updateDialog": {