Popup-Picker 弹出层内容显示异常，多出6列额外选项列


应该只有最前面两列的，而且，使用fixed-columns参数，屏蔽后面的多余列后，前两列也工作正常

- JSON数据：
`[{"name":"安徽","value":"安徽","parent":"0"},{"name":"北京","value":"北京","parent":"0"},{"name":"福建","value":"福建","parent":"0"},{"name":"甘肃","value":"甘肃","parent":"0"},{"name":"广东","value":"广东","parent":"0"},{"name":"广西","value":"广西","parent":"0"},{"name":"贵州","value":"贵州","parent":"0"},{"name":"海南","value":"海南","parent":"0"},{"name":"河北","value":"河北","parent":"0"},{"name":"河南","value":"河南","parent":"0"},{"name":"黑龙江","value":"黑龙江","parent":"0"},{"name":"湖北","value":"湖北","parent":"0"},{"name":"湖南","value":"湖南","parent":"0"},{"name":"吉林","value":"吉林","parent":"0"},{"name":"江苏","value":"江苏","parent":"0"},{"name":"江西","value":"江西","parent":"0"},{"name":"辽宁","value":"辽宁","parent":"0"},{"name":"内蒙古","value":"内蒙古","parent":"0"},{"name":"宁夏","value":"宁夏","parent":"0"},{"name":"青海","value":"青海","parent":"0"},{"name":"山东","value":"山东","parent":"0"},{"name":"山西","value":"山西","parent":"0"},{"name":"陕西","value":"陕西","parent":"0"},{"name":"上海","value":"上海","parent":"0"},{"name":"四川","value":"四川","parent":"0"},{"name":"天津","value":"天津","parent":"0"},{"name":"新疆","value":"新疆","parent":"0"},{"name":"云南","value":"云南","parent":"0"},{"name":"浙江","value":"浙江","parent":"0"},{"name":"重庆","value":"重庆","parent":"0"},{"name":"合肥","value":"合肥","parent":"安徽"},{"name":"北京","value":"北京","parent":"北京"},{"name":"福州","value":"福州","parent":"福建"},{"name":"厦门","value":"厦门","parent":"福建"},{"name":"兰州","value":"兰州","parent":"甘肃"},{"name":"武威","value":"武威","parent":"甘肃"},{"name":"广州","value":"广州","parent":"广东"},{"name":"深圳","value":"深圳","parent":"广东"},{"name":"柳州","value":"柳州","parent":"广西"},{"name":"贵阳","value":"贵阳","parent":"贵州"},{"name":"海口","value":"海口","parent":"海南"},{"name":"石家庄","value":"石家庄","parent":"河北"},{"name":"南阳","value":"南阳","parent":"河南"},{"name":"天津","value":"天津","parent":"河南"},{"name":"郑州市","value":"郑州市","parent":"河南"},{"name":"哈尔滨","value":"哈尔滨","parent":"黑龙江"},{"name":"武汉","value":"武汉","parent":"湖北"},{"name":"天津","value":"天津","parent":"湖南"},{"name":"长沙","value":"长沙","parent":"湖南"},{"name":"长春","value":"长春","parent":"吉林"},{"name":"常州","value":"常州","parent":"江苏"},{"name":"南京","value":"南京","parent":"江苏"},{"name":"苏州","value":"苏州","parent":"江苏"},{"name":"无锡","value":"无锡","parent":"江苏"},{"name":"南昌","value":"南昌","parent":"江西"},{"name":"大连","value":"大连","parent":"辽宁"},{"name":"沈阳","value":"沈阳","parent":"辽宁"},{"name":"呼和浩特","value":"呼和浩特","parent":"内蒙古"},{"name":"银川","value":"银川","parent":"宁夏"},{"name":"西宁","value":"西宁","parent":"青海"},{"name":"济南市","value":"济南市","parent":"山东"},{"name":"青岛市","value":"青岛市","parent":"山东"},{"name":"天津","value":"天津","parent":"山东"},{"name":"太原市","value":"太原市","parent":"山西"},{"name":"西安","value":"西安","parent":"陕西"},{"name":"上海","value":"上海","parent":"上海"},{"name":"成都","value":"成都","parent":"四川"},{"name":"天津","value":"天津","parent":"天津"},{"name":"库尔勒","value":"库尔勒","parent":"新疆"},{"name":"石河子","value":"石河子","parent":"新疆"},{"name":"乌鲁木齐","value":"乌鲁木齐","parent":"新疆"},{"name":"昆明","value":"昆明","parent":"云南"},{"name":"杭州市","value":"杭州市","parent":"浙江"},{"name":"宁波","value":"宁波","parent":"浙江"},{"name":"温州","value":"温州","parent":"浙江"},{"name":"重庆","value":"重庆","parent":"重庆"}]`

- 引用代码：
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