The fileDialog module handles all file/directory/IES selection tasks.
The file dialog respect the following Maya pref:
- FileDialogStyle:
* 1: On Windows or Mac OS X will use a native style file dialog.
NOTE: this will be overriden for IES, as we need the Maya dialog to add
extra IES visualization UI.
* 2: Use a custom file dialog with a style that is consistent across
platforms.
NOTE: The fileDialog2 callbacks are MEL only and we are currently re-using
rfm21 MEL code. In time this should be ported to python.