修改页面，完成单页模式新增首页返回上一页按钮

dist/public/js/lay-module/location/location.css

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+.ew-map-select-tool{padding:5px 15px;box-shadow:0 1px #0000000d}.inline-block{display:inline-block}.layui-btn.icon-btn{padding:0 10px}.pull-right{float:right}.map-select:after,.map-select:before{content:"";display:block;clear:both}.ew-map-select-poi{height:505px;width:250px;overflow-x:hidden;overflow-y:auto;float:left;position:relative;display:block;box-sizing:border-box}.ew-map-select-search-list-item{padding:10px 30px 10px 15px;border-bottom:1px solid #e8e8e8;cursor:pointer;position:relative}.ew-map-select-search-list-item-icon-ok{position:absolute;right:15px;top:50%;transform:translateY(-50%)}#ew-map-select-tips{position:absolute;z-index:999;background:#fff;max-height:430px;overflow:auto;top:48px;left:56px;width:280px;box-shadow:0 2px 4px #0000001f;border:1px solid #d2d2d2}#ew-map-select-tips .ew-map-select-search-list-item{padding:10px 15px 10px 35px}.ew-map-select-search-list-item-icon-search{position:absolute;left:10px;top:50%;transform:translateY(-50%)}.ew-map-select-search-list-item .ew-map-select-search-list-item-title{font-size:14px;color:#262626}.ew-map-select-search-list-item .ew-map-select-search-list-item-address{font-size:12px;color:#595959;padding-top:5px}.cur-load0{display:none;background:url(./img/location.cur)}.cur-load1{display:none;background:url(./img/location_blue.cur)}