Patch the RomFS with the selected updates before dumping. Previously the resulting RomFS only contained data from the original title.
To dump the RomFS without updates the user can disable the update under Properties before choosing Dump RomFS.
On Windows, network shares use paths like \\server\share\file which were
being broken by FileUtil::SanitizePath() removing double slashes.
Changed the code in SanitizePath to permit a double-backslash if it
occurs at the start of a filepath (on Windows only).