refactor: ECHO-415: Revert "BEM Migration in editor"

[luarmr]

Reverts #8660

Just in case

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[yyassi-heartex]

hopefully we won't need it

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[codecov]

Codecov Report

❌ Patch coverage is 83.44828% with 24 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.05%. Comparing base (eda02c5) to head (ab169bf).

Files with missing lines	Patch %	Lines
web/libs/editor/src/common/Button/Button.tsx	0.00%	6 Missing ⚠️
web/libs/editor/src/common/Range/Range.tsx	60.00%	2 Missing ⚠️
.../src/components/AnnotationTab/AutoAcceptToggle.jsx	0.00%	2 Missing ⚠️
...src/components/CurrentEntity/AnnotationHistory.tsx	80.00%	2 Missing ⚠️
...omponents/SidePanels/DetailsPanel/DetailsPanel.tsx	0.00%	2 Missing ⚠️
...src/components/Timeline/Controls/ConfigControl.tsx	33.33%	2 Missing ⚠️
...b/libs/editor/src/common/Pagination/Pagination.tsx	50.00%	1 Missing ⚠️
...bs/editor/src/components/BottomBar/CurrentTask.jsx	66.66%	1 Missing ⚠️
web/libs/editor/src/components/ImageView/Image.jsx	0.00%	1 Missing ⚠️
...omponents/Timeline/Controls/SpectrogramControl.tsx	0.00%	1 Missing ⚠️
... and 4 more

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8688      +/-   ##
===========================================
- Coverage    61.37%   60.05%   -1.32%     
===========================================
  Files          791      554     -237     
  Lines        60451    38895   -21556     
  Branches     10305    10291      -14     
===========================================
- Hits         37099    23359   -13740     
+ Misses       23349    15533    -7816     
  Partials         3        3              

Flag	Coverage Δ
lsf-e2e	54.34% <76.59%> (?)
lsf-integration	50.76% <73.75%> (+<0.01%)	⬆️
lsf-unit	8.39% <9.25%> (+<0.01%)	⬆️
pytests	?

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