Edit config in game

Currently, the config file for simulations is located somewhere at a non-fixed place (e.g. _/ProjectRoot/Saved/Config/WindowsEditor/SimulationProperties.ini_) and the format is neither trivial nor documented anywhere.

It would therefore make sense, that the config file is written by the program at runtime instead, which does have the additional advantage, that the config can be changed at runtime as well. However, right now the config is read at program startup, therefore changes to the config at runtime are not possible yet and will have to be implemented first.