Fix the downsampled tree distance graphs and colorbar

[BadPrograms]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 79.24528% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.17%. Comparing base (d579744) to head (17067ad).
⚠️ Report is 1 commits behind head on v3.x.

Files with missing lines	Patch %	Lines
src/lineagetree/lineage_tree_manager.py	73.68%	5 Missing ⚠️
src/lineagetree/measure/uted.py	84.37%	5 Missing ⚠️
src/lineagetree/_core/_modifier.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             v3.x      #98      +/-   ##
==========================================
- Coverage   86.50%   86.17%   -0.33%     
==========================================
  Files          20       20              
  Lines        1815     1852      +37     
==========================================
+ Hits         1570     1596      +26     
- Misses        245      256      +11     

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[leoguignard]

What is happening here? I feel like there the opposite of factoring that is happening :|