fix(Notification): element renders even when no notification is present (#2561)

Author: rdjanuar

src/runtime/components/overlays/Notifications.vue

@@ -1,7 +1,7 @@
 <template>
   <Teleport to="body">
-    <div :class="wrapperClass" role="region" v-bind="attrs">
-      <div v-if="notifications.length" :class="ui.container">
+    <div v-if="notifications.length" :class="wrapperClass" role="region" v-bind="attrs">
+      <div :class="ui.container">
         <div v-for="notification of notifications" :key="notification.id">
           <UNotification
             v-bind="notification"