Merge branch 'feature/more-storage-statistics' into 'master'

app/controllers/admin/groups_controller.rb

app/controllers/admin/projects_controller.rb

app/controllers/groups_controller.rb

app/helpers/projects_helper.rb

app/helpers/sorting_helper.rb

app/helpers/storage_helper.rb

app/models/ci/build.rb

app/models/group.rb

app/models/lfs_objects_project.rb

app/models/namespace.rb

app/models/project.rb

app/models/project_statistics.rb

app/services/git_push_service.rb

app/services/git_tag_push_service.rb

app/views/admin/groups/_group.html.haml

app/views/admin/groups/index.html.haml

app/views/admin/groups/show.html.haml

app/views/admin/projects/index.html.haml

app/views/admin/projects/show.html.haml

app/views/groups/projects.html.haml