画扇形边线为虚线，图形右键菜单必需点击到线上才生效

[liuyanchen1994]

maptalks's version and what browser you use?

maptalks v1.0.0-rc.6

Issue description

画扇形边线为虚线，图形右键菜单必需点击到线上才生效

Please provide a reproduction URL (on any jsfiddle like site)

https://codepen.io/liuyanchen1994/pen/PoQXmYe