为antd的editable-card类型的TabPane增加不可删除属性

[lixiaoyang1992]

部分 TabPane 可以删除，部分不可以并且不显示删除按钮

[mention-bot]

@lixiaoyang1992, thanks for your PR! By analyzing the history of the files in this pull request, we identified @afc163, @benjycui and @yesmeck to be potential reviewers.

[lixiaoyang1992]

需要配合使用：react-component/tabs#50

[coveralls]

Coverage remained the same at 82.866% when pulling a8d4c25 on lixiaoyang1992:feature-2.8 into 5b14b4f on ant-design:feature-2.8.

[benjycui]

这个需要 rc-tabs 那边合并先吧，我没有对应的 npm 权限 @afc163

[ddcat1115]

@lixiaoyang1992 等rc-tabs那边发布了，这边的依赖应该需要升个版本~

[afc163]

把 unclosable 的 className 加到这里。

react-component/tabs#50 (comment)

[lixiaoyang1992]

但是样式中的一个hover是针对rc-tabs那里的，在这边没法给tab样式

TabBarMixin.js

  const key = child.key;
  let cls = activeKey === key ? `${prefixCls}-tab-active` : '';
  cls += ` ${prefixCls}-tab`;
  let events = {};
  if (child.props.disabled) {
    cls += ` ${prefixCls}-tab-disabled`;
  } else {
    events = {
      onClick: this.onTabClick.bind(this, key),
    };
  }
  const ref = {};
  if (activeKey === key) {
    ref.ref = 'activeTab';
  }
  rst.push(<div
    role="tab"
    aria-disabled={child.props.disabled ? 'true' : 'false'}
    aria-selected={activeKey === key ? 'true' : 'false'}
    {...events}
    className={cls}
    key={key}
    {...ref}
  >
    {child.props.tab}
  </div>);

这里不处理的话，叉号不显示的时候，tab宽度是不应该变窄的

&&-editable-card > &-bar &-tab:not(&-tab-active):not(&-tab-uncloseable):hover {
   padding-left: 8px;
   padding-right: 8px;
 }

[afc163]

确实 tab 上加 className 会比较麻烦。

[afc163]

可以把原来的样式改成这样，这样就可以在上层做处理了。

[lixiaoyang1992]

根据这个思路，修改完了

[afc163]

closeable => closable

[afc163]

className={} 前后不加空格。

[coveralls]

Coverage remained the same at 82.866% when pulling 97c64a8 on lixiaoyang1992:feature-2.8 into 5b14b4f on ant-design:feature-2.8.

[coveralls]

Coverage remained the same at 82.866% when pulling 2ceb1d4 on lixiaoyang1992:feature-2.8 into 5b14b4f on ant-design:feature-2.8.

[benjycui]

Close: #4286