fix: 修复保存清楚时间报错的缺陷

--bug=1048275 --user=王孝刚 【应用】有一个应用设置日志清除策略，提示“引用分段数”字段必填 https://www.tapd.cn/57709429/s/1601736

ui/src/locales/lang/zh_CN/views/application-overview.ts

@@ -47,7 +47,7 @@ export default {
       upload: '上传',
       default: '默认logo',
       custom: '自定义',
-      sizeTip: '建议尺寸 32*32，支持 JPG、PNG, GIF，大小不超过 10 MB',
+      sizeTip: '建议尺寸 32*32，支持 JPG、PNG、GIF，大小不超过 10 MB',
       cancel: '取消',
       save: '保存',
       fileSizeExceeded: '文件大小超过 10 MB',

ui/src/views/application-overview/component/DisplaySettingDialog.vue

@@ -44,7 +44,7 @@
             action="#"
             :auto-upload="false"
             :show-file-list="false"
-            accept="image/*"
+            accept="image/jpeg, image/png, image/gif"
             :on-change="(file: any, fileList: any) => onChange(file, fileList, 'avatar')"
           >
             <el-button icon="Upload">{{
@@ -52,7 +52,7 @@
             }}</el-button>
             <template #tip>
               <div class="el-upload__tip info" style="margin-top: 0">
-                建议尺寸 32*32，支持 JPG、PNG, GIF，大小不超过 10 MB
+                建议尺寸 32*32，支持 JPG、PNG、GIF，大小不超过 10 MB
               </div>
             </template>
           </el-upload>
@@ -81,7 +81,7 @@
             action="#"
             :auto-upload="false"
             :show-file-list="false"
-            accept="image/*"
+            accept="image/jpeg, image/png, image/gif"
             :on-change="(file: any, fileList: any) => onChange(file, fileList, 'float_icon')"
           >
             <el-button icon="Upload">{{
@@ -89,7 +89,7 @@
             }}</el-button>
             <template #tip>
               <div class="el-upload__tip info" style="margin-top: 0">
-                建议尺寸 32*32，支持 JPG、PNG, GIF，大小不超过 10 MB
+                建议尺寸 32*32，支持 JPG、PNG、GIF，大小不超过 10 MB
               </div>
             </template>
           </el-upload>

ui/src/views/application-overview/component/EditAvatarDialog.vue

@@ -37,7 +37,7 @@
               action="#"
               :auto-upload="false"
               :show-file-list="false"
-              accept="image/*"
+              accept="image/jpeg, image/png, image/gif"
               :on-change="onChange"
             >
               <el-button icon="Upload" :disabled="radioType !== 'custom'">{{