Group model names in GUI under "Modell" -> "Model-Name einfügen"

There is a huge number of models available under "Modell" -> "GUI-Name einfügen". Use a dropdown menu which can group elements.

E.g.,

Navigation Models
- org.vadere.simulator.osm.OptimalStepsModel
- ...
Potential Models
- org.vadere.simulator.models.potential.fields.PotentialFieldTargetGrid
- ...

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information