fix: error occurred when switching tab in dashboard component. (#3770)

#### What type of PR is this?
/kind bug
/area console

#### What this PR does / why we need it:
修复 Console 端仪表盘添加组件时，切换标签页面报错的问题。

#### Which issue(s) this PR fixes:
Fixes #3764 

#### Does this PR introduce a user-facing change?
```release-note
修复 Console 端仪表盘添加组件时的报错问题。
```

console/src/modules/dashboard/Dashboard.vue

@@ -74,10 +74,10 @@
       "
       type="outline"
     ></VTabbar>
-
+    <div class="mt-4">
       <template v-for="(group, groupIndex) in widgetsGroup" :key="groupIndex">
-      <div v-if="activeId === group.id" class="mt-4">
         <grid-layout
+          v-if="activeId === group.id"
           :col-num="12"
           :is-draggable="false"
           :is-resizable="false"
@@ -102,8 +102,8 @@
             <component :is="item.widget" />
           </grid-item>
         </grid-layout>
-      </div>
       </template>
+    </div>
   </VModal>
 </template>
 <script lang="ts" setup>