Just some personal vs project changes
Implemented "datasets"

(many changes shown in the commit are only visual studio applying its
formatting :(( )

You can now set a "dataset" in the settings dialog, for having different
save files for WTS/WTB sets

- moved the settingsauc.txt into the root folder of the mod
- added settings gui elements
- added new field "dataset" in settings and its load/save function

known problems for now...
- you have to click save, so the new folder for the dataset gets created
- if folder not created mod will crash on load/save messages
- if value in settings not valid and folder not exists, the mod will
crash on load/save
- the load/save buttons will not grey out if no files available. i'm too
lazy to do that now :)

the last 2 bugs would be no "problem" if the load and save methods would
have more generous error handling :)