shell32: Correctly display file sizes larger than 4 GiB.
Only the lower 32 bits of the file size are stored in the IDLDATA struct, which means that a separate function call is necessary to get the complete 64-bit file size.
Only the lower 32 bits of the file size are stored in the IDLDATA struct, which means that a separate function call is necessary to get the complete 64-bit file size.