Fix: Task stats filter by start time

[timotheeguerin]

fix #1859

[codecov]

Codecov Report

Merging #1860 into stable will increase coverage by 0.21%.
The diff coverage is 30.76%.

@@            Coverage Diff             @@
##           stable    #1860      +/-   ##
==========================================
+ Coverage   61.41%   61.62%   +0.21%     
==========================================
  Files         970      970              
  Lines       26447    26457      +10     
  Branches     4841     4846       +5     
==========================================
+ Hits        16243    16305      +62     
+ Misses      10167    10115      -52     
  Partials       37       37

Impacted Files	Coverage Δ
...ts/gallery/submit/submit-ncj-template.component.ts	60.26% <0%> (-0.55%)	⬇️
...g-time-graph/tasks-running-time-graph.component.ts	71.42% <40%> (+60.31%)	⬆️
src/@batch-flask/ui/charts/chart.directive.ts	73% <0%> (+2%)	⬆️

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