修复pending界面blockNumber错误的问题

src/components/Pending.vue

@@ -31,9 +31,9 @@ export default {
     table: {
       search: '',
       loading: false,
-      groupBy: 'block',
+      groupBy: 'blockNumber',
       groupDesc: false,
-      sortBy: ['block', 'gasPrice', 'pending'],
+      sortBy: ['blockNumber', 'gasPrice', 'timestamp'],
       sortDesc: [false, true, false],
       pageSize: 200,
       pageNum: 1,