message: show non null items
diff: import { Box, Sans } from "@artsy/palette"
  import { ArtworkDetails_artwork } from "__generated__/ArtworkDetails_artwork.graphql"
  +import { ArtistListItem } from "lib/Components/ArtistListItem"
  // import { capitalize } from "lodash"
  import React from "react"
  import { Text } from "react-native"
  @@ -11,27 +12,41 @@ interface ArtworkDetailsProps {
  export class ArtworkDetails extends React.Component<ArtworkDetailsProps> {
  render() {
  + const listItems = [
  + { title: "Medium", value: this.props.artwork.medium },
  + {
  + title: "Condition",
  + value: this.props.artwork.conditionDescription ? this.props.artwork.conditionDescription.label : null,
  + },
  + { title: "Signature", value: this.props.artwork.signature },
  + {
  + title: "Certificate of Authenticity",
  + value: this.props.artwork.certificateOfAuthenticity ? this.props.artwork.certificateOfAuthenticity.label : null,
  + },
  + { title: "Frame", value: this.props.artwork.framed ? this.props.artwork.framed.label : null },
  + { title: "Series", value: this.props.artwork.series },
  + { title: "Publisher", value: this.props.artwork.publisher },
  + { title: "Manufacturer", value: this.props.artwork.manufacturer },
  + { title: "Image rights", value: this.props.artwork.image_rights },
  + ]
  +
  + const displayItems = listItems.filter(i => i.value != null)
  +
  return (
  <Box>
  - <Text>Artwork Details</Text>
  - <Text>Medium</Text>
  - <Text>{this.props.artwork.medium}</Text>
  - <Text>Condition</Text>
  - <Text>{JSON.stringify(this.props.artwork.conditionDescription)}</Text>
  - <Text>Signature</Text>
  - <Text>{JSON.stringify(this.props.artwork.signature)}</Text>
  - <Text>Certificate of Authenticity</Text>
  - <Text>{JSON.stringify(this.props.artwork.certificateOfAuthenticity)}</Text>
  - <Text>Frame</Text>
  - <Text>{JSON.stringify(this.props.artwork.framed)}</Text>
  - <Text>Series</Text>
  - <Text>{JSON.stringify(this.props.artwork.series)}</Text>
  - <Text>Publisher</Text>
  - <Text>{JSON.stringify(this.props.artwork.publisher)}</Text>
  - <Text>Manufacturer</Text>
  - <Text>{JSON.stringify(this.props.artwork.manufacturer)}</Text>
  - <Text>Image rights</Text>
  - <Text>{JSON.stringify(this.props.artwork.image_rights)}</Text>
  + <Sans size="4" weight="medium">
  + Artwork Details
  + </Sans>
  + {displayItems.map(i => (
  + <>
  + <Sans size="3" weight="medium">
  + {i.title}
  + </Sans>
  + <Sans size="3" weight="regular">
  + {i.value}
  + </Sans>
  + </>
  + ))}
  </Box>
  )
  }
  