This commit partially reverts r26425 (ENH: macOS: Update Slicer.app to
include version information) to fix macOS packaging.

Not all files were copied/configured in the "Slicer-X.Y.Z-YYYY-MM-DD.app"
directory, a directory name "Slicer.app" was still used.


Indeed, the directory

/path/to/_CPack_Packages/macosx-amd64/DragNDrop/Slicer-X.Y.Z-YYYY-MM-DD-macosx-amd64/Slicer.app

was containing the following files:

./Contents
./Contents/Info.plist
./Contents/MacOS
./Contents/MacOS/Slicer
./Contents/Resources
./Contents/Resources/qt_menu.nib
./Contents/Resources/qt_menu.nib/classes.nib
./Contents/Resources/qt_menu.nib/info.nib
./Contents/Resources/qt_menu.nib/keyedobjects.nib
./Contents/Resources/Slicer.icns

and the directory

/path/to/_CPack_Packages/macosx-amd64/DragNDrop/Slicer-X.Y.Z-YYYY-MM-DD-macosx-amd64/Slicer-X.Y.Z-YYYY-MM-DD.app

was containing all the libraries and executables to be fixed up.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@26427 3bd1e089-480b-0410-8dfb-8563597acbee