message: add reference to PR
diff: @@ -21,6 +21,7 @@ const styles = {
  },
  dialogActions: {
  // set justifyContent to default value to fix IE11 layout bug
  + // see https://github.com/dmtrKovalenko/material-ui-pickers/pull/267
  justifyContent: 'flex-start',
  },
  dialogAction: {
  