message: Fix the horizon title only show the first key
diff: @@ -62,7 +62,7 @@ class HorizonChart extends React.PureComponent {
  key={row.key}
  width={width}
  height={seriesHeight}
  - title={row.key[0]}
  + title={row.key.join(', ')}
  data={row.values}
  bands={bands}
  colors={colors}
  