Transition variant to version with exception of re-creating the submenu if it
has already been created - algorithm based on 'e' subcommand of 's///' command.
First section in sequence is completly sampled in patternspace - prepare to exclude
create submenu for single target menu entry.

    Product revision version V.
  (c) aso, v.2.0.0 by 07.06.2014.