fix(label): Misbehaving min-length tokens with non-ASCII characters

[patrick96]

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update
• Other: Replace this with a description of the type of this PR

Description

This is just #3087 ported to the 3.7.2 release branch

Related Issues & Documents

Closes #3087
Fixes #3074

Documentation (check all applicable)

• This PR requires changes to the Wiki documentation (describe the changes)
• This PR requires changes to the documentation inside the git repo (please add them to the PR).
• Does not require documentation changes

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (8e04f15) 12.69% compared to head (884eed4) 12.69%.

❗ Current head 884eed4 differs from pull request most recent head 5487af6. Consider uploading reports for the commit 5487af6 to get more accurate results

Files	Patch %	Lines
src/drawtypes/label.cpp	0.00%	5 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           hotfix/3.7.2    #3090      +/-   ##
================================================
- Coverage         12.69%   12.69%   -0.01%     
================================================
  Files               160      160              
  Lines             12528    12529       +1     
================================================
  Hits               1591     1591              
- Misses            10937    10938       +1     

Flag	Coverage Δ
unittests	12.69% <0.00%> (-0.01%)	⬇️

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