Request a feature or report a bug? [这是一个需求还是一个缺陷] One-line summary [问题简述] Version [产品及版本] iClient product (for leaflet,for openlayers,for mapboxgl,classic)[iClient 产品]: iClient version [iClient 版本]: Browser version [浏览器类型和版本]: OS Version [操作系统类型和版本]: Actual Behavior [当前现象] Expected Behavior [期望现象] Example of reproducing the issue [重现现象的例子] What is motivation or use case for changing the behavior? [需求的场景和目的是什么？]