[FEATURE REQUEST] dynamic tui dialog options

[nyxnor]

Is your feature request related to a problem? Please describe.

it shjould only show options for plugins that are installed.
I know how to do it with bash arrays, but how to do it with posix?

Describe the solution you'd like

Describe alternatives you've considered

Additional context

[nyxnor]

https://mac-blog.org.ua/bash-backup-restore-script

Yes, the name is bash backup script but the script is posix.

Example given:

#!/bin/sh

# Disaplay choose dialog with available backups
CHOSEN_DATE=$(whiptail --title "RESTORE BACKUP" --menu "Chose Backup Date" 20 78 10 `for x in /home/example/backups/*.tar.gz; do echo "$x backup" | sed 's/.*www-\(.*\).tar.gz/\1/'; done` 3>&1 1>&2 2>&3)

[nyxnor]

the dynamic part related to plugins being available has a appearance issue, it needs to be a single string.