UI for a default folder for saving state files
Refactoring - Move GetOpenFileName() code from interact.c to wls.c
Refactoring - Add a wrapper for wlsWriteCurrentFieldToFile()
Refactoring - Add a wrapper for dumpstate()
Refactoring - Move GetSaveFileName() code from interact.c to wls.c
"J" config: Use the previous load/save state filename as the default
Use a user-configured folder as the default for loading and saving states