Implement persistent settings saving

[rottaca]

E.g. use a dedicated library or implement a simple text-based settings saver

[rottaca]

Have a look at a very simple example here: https://stackoverflow.com/questions/6892754/creating-a-simple-configuration-file-and-parser-in-c?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa