[PUI] Tweaks for part purchase order table

[SchrodingersGat]

Fixes some columns which were nominally "sortable" - but the sorting did not work.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.32%. Comparing base (5f905aa) to head (66f823e).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8319      +/-   ##
==========================================
- Coverage   84.35%   84.32%   -0.04%     
==========================================
  Files        1165     1165              
  Lines       52845    52845              
  Branches     1931     1931              
==========================================
- Hits        44577    44559      -18     
- Misses       7774     7807      +33     
+ Partials      494      479      -15     

Flag	Coverage Δ
backend	85.90% <ø> (+<0.01%)	⬆️
pui	67.15% <ø> (-0.21%)	⬇️

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