Various SAST fixes

[matmair]

More small reliability/maintainability fixes from SAST warnings.

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[codecov]

Codecov Report

Attention: Patch coverage is 89.47368% with 2 lines in your changes missing coverage. Please review.

Project coverage is 83.74%. Comparing base (b96b8b8) to head (e6cece1).
Report is 321 commits behind head on master.

Files with missing lines	Patch %	Lines
...s/editors/TemplateEditor/PdfPreview/PdfPreview.tsx	0.00%	1 Missing ⚠️
src/frontend/src/tables/InvenTreeTable.tsx	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7644      +/-   ##
==========================================
- Coverage   83.75%   83.74%   -0.02%     
==========================================
  Files        1102     1102              
  Lines       48694    48696       +2     
  Branches     1550     1551       +1     
==========================================
- Hits        40786    40782       -4     
- Misses       7511     7516       +5     
- Partials      397      398       +1     

Flag	Coverage Δ
backend	85.23% <100.00%> (+<0.01%)	⬆️
pui	65.05% <77.77%> (-0.08%)	⬇️

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[matmair]

@SchrodingersGat found the CI problem

[SchrodingersGat]

@matmair what was the issue?

[matmair]

@SchrodingersGat The StylishText component causes errors when getting empty children passed in so I reveres the change in that area

[SchrodingersGat]

Nice :) Happy for me to merge this then?

[matmair]

@SchrodingersGat yes, ready for merge