交卷后，隐藏可能出现的Modal

src/features/OnlineExam/Examing/ExamingHome.vue

@@ -217,6 +217,7 @@ export default {
       paperStruct: null,
       examQuestionList: null
     });
+    this.$Modal.remove();
   },
   // beforeRouteUpdate(to, from, next) {
   //   this.updateQuestion(next);