front: fix trad no item in timetabletoolbar

[Uriel-Sautron]

When our timetable is empty, we must display No item and not No train. During development of PacedTrainItem, we forgot to delete part of the code

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.70%. Comparing base (8afd60f) to head (8ec2543).
Report is 8 commits behind head on dev.

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Additional details and impacted files

@@           Coverage Diff           @@
##              dev   #11033   +/-   ##
=======================================
  Coverage   80.69%   80.70%           
=======================================
  Files        1098     1098           
  Lines      111888   111907   +19     
  Branches      745      745           
=======================================
+ Hits        90289    90315   +26     
+ Misses      21556    21549    -7     
  Partials       43       43           

Flag	Coverage Δ
editoast	72.41% <ø> (+0.03%)	⬆️
front	89.93% <100.00%> (-0.01%)	⬇️
gateway	2.18% <ø> (ø)
osrdyne	2.53% <ø> (ø)
railjson_generator	87.58% <ø> (ø)
tests	87.90% <ø> (ø)

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[SharglutDev]

While paced train is in dev mode, should we keep the No train when switch is off ?

[Uriel-Sautron]

Even if the switch is off in the timetable, a train can be considered as an item.
But I understand your questioning.

[theocrsb]

LGTM and tested

[maelysLeratRosso]

I think we should keep "Aucun train" in the classic mode, if it is not too long to implement, in order not to disturb users

[Uriel-Sautron]

Ok we can leave this PR for the end of the paced train development.