- std::string -> const std::string& where needed
- Added a FileIO abstraction class
- Fixed recent files not updating
- Removed localization file from global include
- Renamed lang to pattern_language/pl
- Renamed EventFileDropped to RequestFileOpen
getSetting now returns a straight nlohmann::json instead of an optional.
If the data isn't present, it will return a json null.
All accesses to the settings will first check that the data has the
expected type.
