:stdcm fix grid margins

[clarani]

Fix #2465

[codecov]

Codecov Report

Merging #2615 (f7a617d) into dev (3fc02cf) will increase coverage by 42.29%.
The diff coverage is 100.00%.

@@              Coverage Diff              @@
##                dev    #2615       +/-   ##
=============================================
+ Coverage     38.11%   80.40%   +42.29%     
  Complexity     1679     1679               
=============================================
  Files           561      241      -320     
  Lines         17229     7662     -9567     
  Branches       2398      965     -1433     
=============================================
- Hits           6567     6161      -406     
+ Misses        10285     1155     -9130     
+ Partials        377      346       -31     

Flag	Coverage Δ
core	83.68% <100.00%> (ø)
front	?

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Impacted Files	Coverage Δ
...ain/java/fr/sncf/osrd/api/stdcm/STDCMEndpoint.java	79.71% <ø> (ø)
...main/java/fr/sncf/osrd/api/stdcm/STDCMRequest.java	100.00% <100.00%> (ø)
...r/sncf/osrd/api/stdcm/UnavailableSpaceBuilder.java	94.87% <100.00%> (ø)
front/src/main/Home/index.js
...rc/applications/editor/tools/switchEdition/tool.ts
...tions/editor/components/LinearMetadata/dataviz.tsx
...ents/Simulation/SpaceTimeChart/createChartDraft.ts
...ications/editor/tools/zoneSelection/components.tsx
front/src/applications/editor/data/utils.ts
front/src/common/InfraSelector/InfraSelector.js
... and 313 more

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