fix: add visibility:hidden to selector:after

[kanouken]

trafficstars

在某些情况下，Select会显示字母A；给-selector:after加上了visibility:hidden;样式 如下所示： .ant-select-multiple .ant-select-selector:after { content: " "; display: inline-block; line-height: 24px; margin: 2px 0; width: 0 }