Resolve "MR "Check out branch" button should be disabled when the source branch is deleted"

Closes #42255

See merge request gitlab-org/gitlab-ce!16631

Improve Nginx configuration files

See merge request gitlab-org/gitlab-ce!16605

Mute notifications in the seeder to speed GDK development

See merge request gitlab-org/gitlab-ce!16747

Fix MR revert check when no merged_at is present

See merge request gitlab-org/gitlab-ce!16760

Improve Geo database setup manual

See merge request gitlab-org/gitlab-ee!4293

Merge branch '4707-improve-geo-geo-disaster-recovery-docs-for-systems-with-multiple-secondaries' into 'master'

Resolve "Improve Geo Disaster Recovery documentation for systems with multiple secondaries"

Closes #4707

See merge request gitlab-org/gitlab-ee!4285

After source branch deletion the Merge request `Check out branch` button is disabled.

Fix JS equality rules in some specs

See merge request gitlab-org/gitlab-ce!16734

More conversions of $.ajax to axios

See merge request gitlab-org/gitlab-ce!16731

CE upstream - 2018-01-29 09:24 UTC

See merge request gitlab-org/gitlab-ee!4298

i18n flash message

Set alternate object directories in run_git

See merge request gitlab-org/gitlab-ce!16715

Resolve "Make tests running bundle install for gitaly more flexible"

Closes #42290

See merge request gitlab-org/gitlab-ce!16654

Digital Ocean Spaces now supports AWS v4 streaming API

See merge request gitlab-org/gitlab-ce!16745

See https://github.com/fog/fog-aws/issues/428#issuecomment-360869183

CE upstream - 2018-01-27 03:25 UTC

See merge request gitlab-org/gitlab-ee!4291

# Conflicts:
#	app/views/help/index.html.haml

[ci skip]

Generalize toggle_buttons for JavaScript usage -- EE merge edition

See merge request gitlab-org/gitlab-ee!4244

Generalize toggle_buttons for JavaScript usage

See merge request gitlab-org/gitlab-ce!16689

Port of cs-fix-commercial-content-check to EE.

See merge request gitlab-org/gitlab-ee!4290

Fix spec failures in issues_spec.rb

Closes #42488

See merge request gitlab-org/gitlab-ce!16744

Include the GitLab version info when commercial content on help page is disabled

Closes #42486

See merge request gitlab-org/gitlab-ce!16743

Fix cancelling of board settings modal

Closes #4565

See merge request gitlab-org/gitlab-ee!4082