Super-group milestone view doesn't include milestones from projects in subgroups
If you have a group/project structure like this:
And you go to the milestone list for Supergroup, you will only see milestones for SupergroupProject. You will not see milestones for Subgroup project.
It seems to me that they should propagate upwards like issues do.
Steps to reproduce
This is the milestones page for a group system set up like in the summary above: https://gitlab.com/groups/gcbug1-supergroup/-/milestones
Notice how it shows only the milestones from SupergroupProject and Supergroup. It does not show the milestones from Subgroup or from Subgroup Project.
All projects and groups in this hierarchy are public.
What is the current bug behavior?
Subgroup milestones and subgroup project milestones do not show up in the milestone list for a supergroup.
What is the expected correct behavior?
Milestones from a group, its projects, and all subgroups and their projects should appear in the milestone list for a group. This behavior would match what is done with issues.
Relevant logs and/or screenshots
See link above.
Output of checks
This bug happens on GitLab.com