More robust createQrCode back-end

[pylipp]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.01%. Comparing base (6ab625d) to head (67d7b54).
⚠️ Report is 8 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2319   +/-   ##
=======================================
  Coverage   75.01%   75.01%           
=======================================
  Files         275      275           
  Lines       18865    18875   +10     
  Branches     1773     1776    +3     
=======================================
+ Hits        14152    14160    +8     
- Misses       4669     4670    +1     
- Partials       44       45    +1     

Flag	Coverage Δ
backend	99.63% <ø> (-0.05%)	⬇️
frontend	66.28% <ø> (ø)
sharedComponents	61.63% <ø> (ø)

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