Minor changes to match help output notes for disconnect command with UEFI Shell 2.2 specification document. Few other formatting changes to fit the help output in 80x25 screen size. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Tapan Shah <tapandshah@hpe.com> Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>