App hotfix 1.21.3

[apaillier-ledger]

Description

Bring all the changes of the new 1.21.3 app into master. See changelog for details.

Changes include

• Bugfix (non-breaking change that solves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)
• Tests
• Documentation
• Other (for changes that might not fit in any category)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 51.60%. Comparing base (d7a7b30) to head (4ef19d8).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #966   +/-   ##
=======================================
  Coverage   51.60%   51.60%           
=======================================
  Files          17       17           
  Lines        1773     1773           
  Branches      233      227    -6     
=======================================
  Hits          915      915           
+ Misses        857      855    -2     
- Partials        1        3    +2     

Flag	Coverage Δ
unittests	51.60% <ø> (ø)

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