修改antd tree组件，使其横向排列。

修改antd tree组件，使其横向排列。

 :global {
    ul > li.ant-tree-treenode-switcher-close{
      white-space: pre-wrap;
    }
    ul>li.ant-tree-treenode-switcher-open{
      background-color: #fff;
      white-space: pre-wrap;
      margin-bottom: 20px;
      padding-bottom: 10px;
    }
    ul > li > ul.ant-tree-child-tree {
    //  display: flex;
      width: 1024px;
      background-color: #fff;
    }

    ul > li > ul > li.ant-tree-treenode-switcher-close {
      display: inline-block;
      justify-content: space-between;
      padding: 10px 0 0 ;
      width:250px;
    }

    ul > li > ul > li.ant-tree-child-tree > li:first-child {
      padding: 0;
    }
  }