message: show spinner for bidding and registration flow
diff: @@ -87,6 +87,8 @@ export const RegistrationFlowRenderer: React.SFC<BidderFlowRendererProps> = ({ r
  render={({ props, error }) => {
  if (error) {
  console.error(error)
  + } else if (!props) {
  + return render({ props, error }) // So that we show the spinner
  } else if (props) {
  return render({
  props: {
  @@ -126,6 +128,8 @@ export const BidFlowRenderer: React.SFC<BidderFlowRendererProps> = ({ render, ar
  render={({ props, error }) => {
  if (error) {
  console.error(error)
  + } else if (!props) {
  + return render({ props, error }) // So that we show the spinner
  } else if (props) {
  // Note that we need to flatten the query above before passing into the BidFlow component.
  // i.e.: the `sale_artwork` is nested within `artwork`, but we want the sale_artwork itself as a prop.
  @@ -137,7 +141,6 @@ export const BidFlowRenderer: React.SFC<BidderFlowRendererProps> = ({ render, ar
  error,
  })
  }
  - return null
  }}
  />
  )
  