Table: fix border style bug in FF (#3926)
Table: fix border style bug in FF (#3926)

linux系统FF浏览器border显示不全
immissile/m-element,ElemeFE/element,Raganof/element,ElemeFE/element,iamnewsea/element-pzx,Kingwl/element,JavascriptTips/element,baiyaaaaa/element,JavascriptTips/element,immissile/m-element,Kingwl/element,Raganof/element,Leopoldthecoder/element-1,renxia/element,huguangju/element,renxia/element,Leopoldthecoder/element-1,baiyaaaaa/element,huguangju/element,iamnewsea/element-pzx