[0.4.8][SHELL32] Copy without FILE_ATTRIBUTE_READONLY from a CDROM CORE-18089 (#4386)

[0.4.8][SHELL32] Copy without FILE_ATTRIBUTE_READONLY from a CDROM CORE-18089 (#4386)

That problem in the shell was unhidden when we switched from our own to the MS-PL CDFS-driver
in 0.4.8-dev-164-g ec6b3ecbe48ad51c366563196cc93a6ae74e8b69
because our own old CDFS driver erroneously never reported any CD file being read-only.

Fix picked from 0.4.15-dev-4348-g 513d0a6d2d4652671c9b7c92c495edce6d9491a4

While backporting the fix, I decided to port back also some EOL-whitespace-stripping in that file.