Feature request: add Sign-Off

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Good day colleagues,

It is common best practice to equip the commits with Sign-Off message.

It could be done by git client:

git commit --help | grep sign
Unknown locale, assuming C
       -s, --signoff, --no-signoff
           commit log message. The meaning of a signoff depends on the project
           signoffs are used in that project.
           The --no-signoff option can be used to countermand an earlier
           --signoff option on the command line.

Unfortunately, I don't see such an option from, GitLab IDE. So I am kindly asking to add the checkbox which will allow to automatically add Sign-Off message to commit description automatically.