修复表格滑动条表头与内容不齐

src/styles/default.less

@@ -38,6 +38,10 @@
 .el-table th {
   padding: 5px 0;
 }
+.el-table th.gutter:last-of-type {
+    display: block !important;
+    width: 10px !important;
+}
 .grid .el-table__body-wrapper .el-table__row td{
     border-left: 1px solid rgb(245,245,245);
     border-top: 1px solid rgb(245,245,245);