fix: FE - reduce size of spinner to fit in its box

[infonl-marcel]

FE - reduce size of spinner to fit in its box. Available box space is 17.9883px. So took 18px.

Solves PZ-4454

[github-actions]

unit-test-results

 75 files  102 suites   2m 1s ⏱️
345 tests 344 ✅ 1 💤 0 ❌
425 runs  423 ✅ 2 💤 0 ❌

Results for commit 997efbe.

[github-actions]

integration-test-results

 27 files   27 suites   31s ⏱️
105 tests 105 ✅ 0 💤 0 ❌
118 runs  118 ✅ 0 💤 0 ❌

Results for commit 997efbe.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.96%. Comparing base (39441bb) to head (997efbe).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #2273   +/-   ##
=========================================
  Coverage     51.96%   51.96%           
  Complexity     3168     3168           
=========================================
  Files           998      998           
  Lines         22516    22516           
  Branches       1654     1654           
=========================================
  Hits          11700    11700           
  Misses        10085    10085           
  Partials        731      731           

Flag	Coverage Δ
integrationtests	48.87% <ø> (ø)
unittests	32.10% <ø> (ø)

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[edgarvonk]

spinnin'