Use windows Forms to add folder selection dialogs in three places.

Use FolderBrowserDialog to get log path, sync path for new upload, and path for controller configs.

The only bit I'm not sure about is depending on pythonnet 3.0.0 (2.5.2 doesn't install here on windows 10) from prerelease with pip install --pre. Or if it can be frozen properly with cx_freeze, etc. will give that a shot if this is an acceptable dependency on windows.