Milestone in sidebar does not link to group milestone page

See this issue: https://gitlab.com/gitlab-org/gitlab-ce/issues/24395

The milestone is 9.7, which is a native group milestone for gitlab.org.

It does not link to the group milestone page.

changed the description

assigned to @jarka

mentioned in merge request !13063 (closed)

Closed by https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/13199, I didn't realise we already had an issue for this

closed