CE port of "Comment will select all activites filter by default"

What does this MR do?

This is a CE port of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14063

Conformity

• [-] Changelog entry
• [-] Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• Separation of EE specific content