editoast: fix operational-studies-routes

[younesschrifi]

close #5630

[flomonster]

LGTM. We could add a test or two.

[codecov]

Codecov Report

Merging #5646 (4f0ca39) into dev (24c2796) will increase coverage by 0.00%.
Report is 15 commits behind head on dev.
The diff coverage is 57.14%.

@@            Coverage Diff            @@
##                dev    #5646   +/-   ##
=========================================
  Coverage     19.61%   19.62%           
  Complexity     2322     2322           
=========================================
  Files           879      879           
  Lines        105591   105597    +6     
  Branches       2566     2566           
=========================================
+ Hits          20716    20720    +4     
- Misses        83372    83374    +2     
  Partials       1503     1503           

Flag	Coverage Δ
editoast	67.98% <57.14%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
editoast/src/views/study.rs	94.31% <50.00%> (+0.13%)	⬆️
editoast/src/views/scenario.rs	96.42% <60.00%> (+0.17%)	⬆️

... and 2 files with indirect coverage changes