Add group milestones routes and controller.
Skeleton of the group milestone index page.
Show title of milestone.
Create group milestones service.
Reuse existing milestones counting.
Move group milestone processing from service to model.
Filter group milestones.
Close and reopen group milestones.
Get one group milestone based on milestone title.
Start building group milestone show page.
Move milestone link in group head, 2 column milestone for MR and issues.
Correct authorization for group milestones.
Show all issues and merge requests that could be considered opened or closed, includes reopened and merged.
Fix styling issues.
Add group service spec.
Add feature tests for group milestone.
Merge branch 'group_milestones' into 'master'

Group milestones