fix：新建分组前清空操作;

src/renderer/src/views/classManage/basicGroup.vue

@@ -266,6 +266,9 @@ const btnSave = () => {
 }
 //新建小组
 const addGroup = () => {
+  // 做清空处理
+  groupForm.groupname = ''
+  groupForm.orderidx = 0
   groupVisible.value = true
 }
 const btnGroupSave = () => {