Generating restart file?

[gijsber]

Newly created models often have initial conditions that are not really suitable, which the solver handles by making small timesteps till the model is in more appropriate state.

Should we add an option (in the toml) to create a restart file at the end of the run ?

[visr]

Closing as a duplicate of #1358. Since the file isn't large, I'd opt for always writing it, and not adding an option to the TOML.