message: use css instead of style prop in MergeActions
diff: @@ -5,7 +5,7 @@ import MergeButton from './MergeButton'
  const MergeActions = ({numCommits, onClick, desktopUrl, state}) => {
  return (
  - <Box py={3} px={4} bg="gray.0" style={{borderBottomLeftRadius: '3px', borderBottomRightRadius: '3px'}}>
  + <Box py={3} px={4} bg="gray.0" css={{borderBottomLeftRadius: '3px', borderBottomRightRadius: '3px'}}>
  <MergeButton primary={state === 'ready'} numCommits={numCommits} onClick={onClick} />
  <Text ml={2}>You can also </Text>
  <Link nounderline href={desktopUrl}>
  