Adjustment of STDCM interface (Part 1)

[kmer2016]

There are some differences between mockup and the STDCM interface implementation. This PR fix three of them

• Set a fixed width for the Consist and Itinerary sections as defined in the mockup #8730 (first commit)
• Fix the arrow icon in the Select dropdown for changing CH code #8731 (second commit)
• the label of the select are blue instead of black #8757 (second commit)

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 37.01%. Comparing base (ef82519) to head (7e6d45a).
Report is 33 commits behind head on dev.

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Additional details and impacted files

@@             Coverage Diff              @@
##                dev    #8804      +/-   ##
============================================
+ Coverage     36.97%   37.01%   +0.04%     
- Complexity     2208     2212       +4     
============================================
  Files          1255     1253       -2     
  Lines        113846   113882      +36     
  Branches       3188     3188              
============================================
+ Hits          42099    42158      +59     
+ Misses        69852    69828      -24     
- Partials       1895     1896       +1     

Flag	Coverage Δ
core	74.79% <ø> (+0.06%)	⬆️
editoast	72.35% <ø> (+0.28%)	⬆️
front	14.95% <ø> (-0.02%)	⬇️
gateway	2.20% <ø> (ø)
osrdyne	2.71% <ø> (ø)
railjson_generator	87.49% <ø> (ø)
tests	86.37% <ø> (ø)

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[SharglutDev]

Thank you for the PR ! Consist/itinerary and blue>black label fixes are good for me but still have some issues with the select one.

[Caracol3]

If the width should be fixed, are we sure to want to keep the icon ? When french langage is on, it prevents to put 'code de composition on one line'. Or maybe we should put it under the icon ?

If we keep it like that, i think it would be good to at least add a padding between the icon and the text. For me, the two are too close.

EDIT: in the sketch its called 'code compo.' , this solves the problem.

[SharglutDev]

Lgtm and tested

[Caracol3]

In consist component, like 'tracion engine', 'speed limits' and 'composition code' should be bold.

[kmer2016]

Thank you for your review, @Caracol3. I will address your feedback in a separate PR where I will directly implement the Code Compo. component.

[Caracol3]

lgtm