Switch: fix style bug for IE, #255
Switch: fix style bug for IE, #255

wisedu/bh-mint-ui2,hiyali/hunt-mint-ui,ElemeFE/mint-ui,hiyali/hunt-mint-ui,ElemeFE/mint-ui,Leopoldthecoder/kebab-ui,wisedu/bh-mint-ui2,galenyuan/mint-ui,galenyuan/mint-ui,Leopoldthecoder/kebab-ui