Unsafe processing of special characters in CLI autocomplete

Using the ' character inside a value in config mode leads to unsafe execution of this value. For example:

[edit]
vyos@vyos# set '`echo leaked > /tmp/cli`' [TAB]
[edit]
vyos@vyos# cat /tmp/cli 
leaked
[edit]
vyos@vyos#

Or even more funny (DO NOT DO THIS ON PRODUCTION):

set '`sudo systemctl reboot`'
[TAB to reboot immediately]

This is a critical bug, a proper processing of special characters should be added.