message: move Box component to top of SideNav
diff: @@ -5,6 +5,7 @@ import * as docs from '../components/docs'
  const SideNav = () => (
  <Relative>
  + <Box width={248} bg="gray.0" display="inline-block">
  <FlexContainer flexDirection="column" alignItems="start" p={5} borderBottom={1} borderColor="gray.2">
  <NextLink href="/components/docs/system-props">
  <Link nounderline scheme="gray-dark" href="/components/docs/system-props" m={0} mb={4}>
  @@ -17,7 +18,6 @@ const SideNav = () => (
  </Link>
  </NextLink>
  </FlexContainer>
  - <Box width={248} bg="gray.0" display="inline-block">
  <Box pt={5} pl={5}>
  <Text fontWeight="bold" is="p" color="black" m={0} mb={3}>
  <NextLink href="/components/docs/Avatar">
  