Spawning Simulations with config file and provided population fails

[JohannesPonge]

Ideally, this should work:

sim = Simulation("data/DefaultConf.toml", population = "SH")

But we're getting:

ERROR: "Warning: Unhandled arguments provided - Base.Pairs(:population => \"SH\"). You cannot overwrite parameters in a provided config file"
Stacktrace:
 [1] Simulation(configfile::String, populationidentifier::String; settingsfile::String, label::String,
 stepmod::Function, params::Nothing, simargs::@Kwargs{…})
   @ GEMS C:\Users\JPong\Documents\git\GEMS_GitHub\src\structs\simulation.jl:487
 [2] #Simulation#279
   @ C:\Users\JPong\Documents\git\GEMS_GitHub\src\structs\simulation.jl:672 [inlined]
 [3] top-level scope
   @ c:\Users\JPong\Documents\git\GEMS_GitHub\localtests.jl:131
Some type information was truncated. Use `show(err)` to see complete types.