scripts: simplex-servers-update menu to update only server binaries etc. (#1445)

* scripts/simplex-servers-update: refactor

* simplex-servers-update: don't check empty variable

* simplex-servers-update: minor decoration change

* simplex-servers-update: add new line when reexecuting script

* simplex-servers-update: refactor menus

* simplex-servers-update: fix re-executing

* simplex-servers-update: fix menus

* simplex-servers-update: do not rerended menu every time

* simplex-servers-update: update menus logic

* simplex-servers-update: ask permission to update only if versions differ

* simplex-servers-update: skip empty variable

* simplex-servers-update: include while loop

* simplex-servers-update: update re-executing skip logic

* simplex-servers-update: ignore empty

* simplex-servers-update: s/while/if

* simplex-servers-update: ignore empty variable

* simplex-servers-update: update skipping scripts

* simplex-servers-update: minor fixes

* simplex-servers-update: add spaces

* simplex-servers-update: safeguard files and add cleanup logic

* simplex-servers-update: update menus

* simplex-servers-update: fix binary check

* simplex-servers-update: adjust erasing lines

* simplex-servers-update: simplify bin update logic

* simplex-servers-update: fix binary path

* simplex-servers-update: format errors

* scripts/main/simplex-servers-update: initial refactor2

* simplex-servers-update: incr update

* simplex-servers-update: initial dynamic menu

* simplex-servers-update: misc fixes

* simplex-servers-update: fix VER

* simplex-servers-update: add VER check

* simplex-servers-update: abort early if there's no options available

* simplex-servers-update: add new helper function and update_misc

* simplex-servers-update: pass selection

* simplex-servers-update: non-interactive usage

* simplex-servers-update: add help menu

* simplex-servers-update: misc fixes and new binary update logic

* simplex-servers-update: local path check

* simplex-servers-update: fix change check

* simplex-servers-update: OLF -> OLD

* simplex-servers-update: always return code from functions

* simplex-servers-update: new menu flow

* simplex-servers-update: fixes

* simplex-servers-update: download function + fixes

* simplex-servers-update: s/bins/binaries

* simplex-servers-update: download message

* simplex-servers-update: cleanup

Author: shumvgolove