Promote an issue to an epic

Closes #3777

See merge request gitlab-org/gitlab-ee!8051

Switch from CBC to GCM for Geo logout tokens

Closes #5609

See merge request gitlab-org/gitlab-ee!8518

Docs: Cleaning up various links (CE to EE Port)

See merge request gitlab-org/gitlab-ee!8462

The AES-256-GCM cipher is the current best practice for symmetric
encryption. It also allows us to protect with authentication the
content of the return_to and validate everything on the Geo primary
node, otherwise, we can open a security hole.

Use `gl-tooltip` directive in badges, cycle analytics, and diffs

See merge request gitlab-org/gitlab-ee!8463

CE upstream - 2018-11-21 02:21 UTC

Closes gitlab-ce#53571

See merge request gitlab-org/gitlab-ee!8542

Add Pages access control user docs

See merge request gitlab-org/gitlab-ee!8547

Deprecate UX Guide and redirect to design.gitlab

See merge request gitlab-org/gitlab-ee!8546

Update "Create new group" docs

See merge request gitlab-org/gitlab-ee!8502

- add issue_promote_service
- add system notes when an issue is promoted
- add support for promotion using quick actions
- display warning when promoting an issue

[ci skip]

[ci skip]

Update nfs_host_client_setup.md

See merge request gitlab-org/gitlab-ee!8538

Rails5: Passing a class as a value in an Active Record query is deprecated

See merge request gitlab-org/gitlab-ee!8540

Fix issues analytics query

Closes #8475

See merge request gitlab-org/gitlab-ee!8509

Fix Issuable container element selector for shortcuts handling

Closes #8511

See merge request gitlab-org/gitlab-ee!8544

Docs: clarify that labels pages do not show labels from ancestor group

See merge request gitlab-org/gitlab-ee!8524

# Conflicts:
#	app/assets/javascripts/environments/components/environment_item.vue
#	app/assets/javascripts/environments/components/environments_table.vue
#	app/assets/javascripts/monitoring/components/dashboard.vue
#	app/assets/javascripts/monitoring/components/graph/flag.vue
#	app/assets/javascripts/notes/components/note_form.vue
#	app/assets/javascripts/pipelines/components/graph/graph_component.vue
#	app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline.vue
#	app/assets/javascripts/vue_shared/components/sidebar/date_picker.vue
#	app/views/repository_check_mailer/notify.html.haml
#	app/views/repository_check_mailer/notify.text.haml

[ci skip]

Upgrade prettier to v1.15.2

See merge request gitlab-org/gitlab-ce!22893

EE port of "Upgrade prettier to v1.15.2"

See merge request gitlab-org/gitlab-ee!8492

Add user docs for Pages access control

Closes #54143

See merge request gitlab-org/gitlab-ce!23145

Merge branch '53571-Add-the-fact-that-Web-IDE-does-syntax-highlighting-for-all-languages-supported-by-Monaco' into 'master'

Added information about syntax highlighting in Web IDE. Fixes gitlab-org/gitlab-ce#53571

Closes #53571

See merge request gitlab-org/gitlab-ce!23117

Align issue status label and confidential icon

Closes #53943

See merge request gitlab-org/gitlab-ce!23046

Externalize strings from `/app/views/repository_check_mailer`

See merge request gitlab-org/gitlab-ce!23211