front: fix speedspacechart resize behavior

[Yohh]

close #9909

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.83%. Comparing base (52ef1ae) to head (0ff985d).
Report is 15 commits behind head on dev.

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #9958      +/-   ##
==========================================
- Coverage   79.84%   79.83%   -0.01%     
==========================================
  Files        1048     1048              
  Lines      105062   105076      +14     
  Branches      756      756              
==========================================
+ Hits        83887    83891       +4     
- Misses      21134    21144      +10     
  Partials       41       41              

Flag	Coverage Δ
editoast	73.32% <ø> (-0.07%)	⬇️
front	89.34% <100.00%> (+0.01%)	⬆️
gateway	2.18% <ø> (ø)
osrdyne	3.28% <ø> (ø)
railjson_generator	87.49% <ø> (ø)
tests	87.00% <ø> (ø)

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[clarani]

LGTM ✅

[Uriel-Sautron]

LGTM, good work