Merge branch '450666-add-control' into 'master'

Move Add to tree control

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/180951



Merged-by: Jacques Erasmus <jerasmus@gitlab.com>
Approved-by: Chaoyue Zhao <czhao@gitlab.com>
Approved-by: Jacques Erasmus <jerasmus@gitlab.com>
Reviewed-by: Jacques Erasmus <jerasmus@gitlab.com>
Reviewed-by: Chaoyue Zhao <czhao@gitlab.com>
Reviewed-by: GitLab Duo <gitlab-duo@gitlab.com>
Reviewed-by: Alyssa Trinh <atrinh@gitlab.com>
Co-authored-by: psjakubowska <psedlak-jakubowska@gitlab.com>