front: map: use only Roboto not OpenSans

[Tristramg]

This reduces the number of fonts

Ref #10627

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.83%. Comparing base (3f83ed4) to head (7521d36).
Report is 43 commits behind head on dev.

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #10628      +/-   ##
==========================================
- Coverage   81.83%   81.83%   -0.01%     
==========================================
  Files        1081     1081              
  Lines      106882   106882              
  Branches      729      729              
==========================================
- Hits        87469    87465       -4     
- Misses      19372    19376       +4     
  Partials       41       41              

Flag	Coverage Δ
editoast	74.31% <ø> (-0.02%)	⬇️
front	89.38% <ø> (ø)
gateway	2.18% <ø> (ø)
osrdyne	3.28% <ø> (ø)
railjson_generator	87.50% <ø> (ø)
tests	88.14% <ø> (ø)

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[emersion]

Just to double check: is @thibautsailly aware of this change?

[thibautsailly]

Just to double check: is @thibautsailly aware of this change?

Yes, no problem. I will resume work on the map themes later and will make propositions for fonts then. For now Roboto is the easiest way to go.

[Tristramg]

@emersion now that the blueprint has been removed, roboto was only used in dark mode, so I suppose it was just forgotten when migrating to roboto

[emersion]

LGTM!