Improve volume form error display

dashboard/src/components/app/Storage.vue

@@ -191,8 +191,8 @@ onMounted(async () => {
 
     <FormGroup>
       <label>{{ $t('app.storage.mounts.title') }} <sup><a href="https://docs.cloudron.io/apps/#mounts" class="help" target="_blank"><i class="fa fa-question-circle"></i></a></sup></label>
-      <div class="has-error" v-if="mountsError">{{ mountsError }}</div>
       <div description v-html="$t('storage.mounts.description')"></div>
+      <div class="error-label" v-if="mountsError">{{ mountsError }}</div>
 
       <table class="table table-hover" style="margin-top: 10px;" v-if="mounts.length">
         <thead>