!222 UI add reloading tip

Merge pull request !222 from 潘慧/master_ph

mindinsight/ui/src/components/header.vue

@@ -48,6 +48,7 @@ limitations under the License.
                  timeReloadValue+$t('header.timeSecond')+$t('symbols.rightbracket')"
                  @change="timeReload"></el-switch>
       <i class="el-icon-edit"
+         :title="$t('header.timeReloadScope')"
          v-if="isTimeReload && !isShowInp"
          @click="editTime"></i>
 

mindinsight/ui/src/locales/zh-cn.json

@@ -28,7 +28,8 @@
     "refreshData": "刷新数据",
     "RefreshingData": "正在刷新数据",
     "timeReload": "自动刷新",
-    "timeSecond": "秒"
+    "timeSecond": "秒",
+    "timeReloadScope": "自动刷新时长范围为[3, 300]秒"
   },
   "summaryManage": {
     "summaryList": "训练列表",