TransactionAdmin: make it faster by caching description values

[PetrDlouhy]

No description provided.

[codecov-commenter]

Codecov Report

Patch coverage: 73.33% and project coverage change: -0.16% ⚠️

Comparison is base (79703ea) 92.97% compared to head (f13e807) 92.81%.
Report is 1 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #105      +/-   ##
==========================================
- Coverage   92.97%   92.81%   -0.16%     
==========================================
  Files          59       59              
  Lines        3829     3844      +15     
  Branches      250      254       +4     
==========================================
+ Hits         3560     3568       +8     
- Misses        224      229       +5     
- Partials       45       47       +2     

Files Changed	Coverage Δ
hordak/admin.py	92.70% <73.33%> (-7.30%)	⬇️

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