Fix: dont lose permissions ui if owner changed from null

[shamoon]

Proposed change

See linked issue, just wasnt including the case where current user is empty. Video below

5429.mov

Closes #5429

Type of change

• Bug fix: non-breaking change which fixes an issue.
• New feature: non-breaking change which adds functionality. Please read the important note above.
• Breaking change: fix or feature that would cause existing functionality to not work as expected.
• Documentation only.
• Other. Please explain:

Checklist:

• I have read & agree with the contributing guidelines.
• If applicable, I have included testing coverage for new code in this PR, for backend and / or front-end changes.
• If applicable, I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.
• If applicable, I have checked that all tests pass, see documentation.
• I have run all pre-commit hooks, see documentation.
• I have made corresponding changes to the documentation as needed.
• I have checked my modifications for any breaking changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ea632d0) 96.49% compared to head (fc0ed04) 96.48%.

❗ Current head fc0ed04 differs from pull request most recent head 8b0482d. Consider uploading reports for the commit 8b0482d to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #5433      +/-   ##
==========================================
- Coverage   96.49%   96.48%   -0.02%     
==========================================
  Files         400      400              
  Lines       15707    15704       -3     
  Branches     1193     1197       +4     
==========================================
- Hits        15157    15152       -5     
- Misses        546      548       +2     
  Partials        4        4              

Flag	Coverage Δ
backend	95.19% <ø> (-0.05%)	⬇️
frontend	98.02% <100.00%> (+0.02%)	⬆️

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[github-actions]

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