Merge branch 'replies-visual-alignment-fix' into 'master'

Replies toggle: visually align with content

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/173836



Merged-by: Alex Pennells <apennells@gitlab.com>
Approved-by: Julia Miocene <jmiocene@gitlab.com>
Approved-by: Alex Pennells <apennells@gitlab.com>
Co-authored-by: Sascha Eggenberger <seggenberger@gitlab.com>