Merge branch 'patch-70' into 'master'

note that todos are not affected by GitLab Notification Email settings

See merge request gitlab-org/gitlab-ce!29539

doc/workflow/todos.md

@@ -34,6 +34,8 @@ A Todo appears in your Todos dashboard when:
   - the author, or
   - have set it to automatically merge once pipeline succeeds.
 
+Todo triggers are not affected by [GitLab Notification Email settings](notifications.md).
+
 NOTE: **Note:**
 When an user no longer has access to a resource related to a Todo like an issue, merge request, project or group the related Todos, for security reasons, gets deleted within the next hour. The delete is delayed to prevent data loss in case user got their access revoked by mistake.