Display correct error if there were no graphql errors

[dominik-zeglen]

I want to merge this change because it fixes #524

PR intended to be tested with API branch: master

Pull Request Checklist

1. All visible strings are translated with proper context.
2. All data-formatting is locale-aware (dates, numbers, and so on).
3. Translated strings are extracted.
4. Number of API calls is optimized.
5. The changes are tested.
6. Type definitions are up to date.
7. Changes are mentioned in the changelog.

[codecov]

Codecov Report

Merging #525 into master will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #525      +/-   ##
==========================================
- Coverage   72.01%   71.99%   -0.02%     
==========================================
  Files         709      709              
  Lines        8137     8135       -2     
  Branches     1337     1336       -1     
==========================================
- Hits         5860     5857       -3     
- Misses       2020     2021       +1     
  Partials      257      257              

Impacted Files	Coverage Δ
src/hooks/makeQuery.ts	4.54% <0.00%> (ø)
src/mutations.tsx	5.88% <0.00%> (-0.37%)	⬇️
src/queries.tsx	6.06% <0.00%> (ø)
...s/components/OrderFulfillPage/OrderFulfillPage.tsx	91.30% <0.00%> (-0.54%)	⬇️
src/orders/queries.ts	100.00% <0.00%> (ø)

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