fix db editor relationship incorrect filtering when object selected

[PiispaH]

Temporary fix for incorrect filtering

Fixes #2190

Checklist before merging

• Documentation is up-to-date
• Release notes have been updated
• Unit tests have been added/updated accordingly
• Code has been formatted by black
• Unit tests pass

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.10 🎉

Comparison is base (6325abe) 63.67% compared to head (e86028e) 63.77%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2193      +/-   ##
==========================================
+ Coverage   63.67%   63.77%   +0.10%     
==========================================
  Files         197      197              
  Lines       35786    35781       -5     
  Branches     6067     6065       -2     
==========================================
+ Hits        22787    22821      +34     
+ Misses      11788    11746      -42     
- Partials     1211     1214       +3     

Impacted Files	Coverage Δ
...ine_db_editor/mvcmodels/single_parameter_models.py	66.66% <100.00%> (+0.78%)	⬆️

... and 5 files with indirect coverage changes

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