修复考试不配置groupByUser参数，导致评阅页面切换试题按钮丢失

src/views/platform/examination/question/judge.vue

@@ -331,7 +331,9 @@ export default {
     const { tagData, tagName } = (await getSetting('examTag')) || {}
     if (tagData) {
       this.groupByUser = tagData.groupByUser
-      this.activeName = '答卷1'
+      if (this.groupByUser) {
+        this.activeName = '答卷1'
+      }
     }
     this.loadData()
     // 监听键盘事件