NSWorkspace bug

[Enrico Sersale]

-getInfoForFile:application:type: seems to consider only the case in which
the file extension is equal to "bundle" to return NSPlainFileType when
the type returned by NSFileManager is NSFileTypeDirectory.

This is wrong, because, some applications as, for examples, Preferences,
declare an extension in their NSTypes that is used for *directories* that
have this extensions.

This behaviour forces GWorkspace to use some ugly workarounds to not show
the condents of those directories.