This is Alexey from ALM Works.
You're right, this function is not yet available in Structure.Gantt for Cloud and we're working hard on making all features of Gantt for Server/DC available on Cloud as soon as possible. It is planned to be available later this year.
If you already heard about Smart Commits in Bitbucket, know that you just stumbled upon something even better (and smarter!): Genius Commits by Better DevOps Automation for Jira Data Center (+ Server...
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