The used auto-completion package https://github.com/stecman/symfony-console-completion was changed recently and changes are significant enough to be applied to In-Portal as well.
- built-in support for completing command names in "help" command
- support for completion on CentOS with Bash 3.x
- error reporting for cases, when "bash-completion" package isn't installed
- constant "You have new mail" message interfering with auto-completion
- use DEV version of package in Composer
- update Composer dependencies
- regenerate Bash completion hook, that is stored under "/tools/" folder