CE upstream: Friday

• both modified: app/assets/javascripts/boards/components/board_new_issue.js
• both modified: app/assets/javascripts/boards/models/list.js
• both modified: app/assets/javascripts/locale/es/app.js
• both modified: app/assets/javascripts/locale/zh_CN/app.js
• both modified: app/assets/stylesheets/pages/issuable.scss
• both modified: app/assets/stylesheets/pages/settings.scss
• both modified: app/controllers/projects/application_controller.rb
• both modified: app/controllers/projects/environments_controller.rb
• both modified: app/controllers/projects/issues_controller.rb
• both modified: app/controllers/projects/merge_requests_controller.rb
• both modified: app/views/projects/edit.html.haml
• both modified: app/views/projects/tree/_tree_header.html.haml
• both modified: config/routes/project.rb
• both modified: doc/api/projects.md
• both modified: doc/install/requirements.md
• both modified: lib/api/entities.rb
• both modified: lib/api/internal.rb
• both modified: lib/gitlab/visibility_level.rb
• both modified: spec/features/merge_requests/closes_issues_spec.rb
• both modified: spec/javascripts/vue_mr_widget/stores/mr_widget_store_spec.js
• both modified: spec/lib/banzai/filter/milestone_reference_filter_spec.rb
• both modified: spec/lib/gitlab/gitaly_client/notifications_spec.rb
• both modified: spec/lib/gitlab/gitaly_client/ref_spec.rb
• both modified: spec/lib/gitlab/visibility_level_spec.rb
• both modified: spec/services/git_push_service_spec.rb
• both modified: spec/workers/every_sidekiq_worker_spec.rb