Port of PO validation

See merge request gitlab-org/gitlab-ee!6183

Add Ultimate badge to license management

See merge request gitlab-org/gitlab-ee!6174

Make sure the security report strings don't mix variable usage. This
is now validated.

Eliminate N+1 queries in path lock checks during a push

Closes #6465

See merge request gitlab-org/gitlab-ee!6159

Updates to `.po` & `.pot` linting

Closes #46096 et #39292

See merge request gitlab-org/gitlab-ce!18779

Extract EE-specific lines from discussion views

Closes #6103 et #6226

See merge request gitlab-org/gitlab-ee!6129

Group SAML settings link checks license

See merge request gitlab-org/gitlab-ee!6147

[EE] Extract EE specific files/lines for spec/lib/gitlab/ci

See merge request gitlab-org/gitlab-ee!6173

This significantly improves performance when a user
pushes many references.

`project.path_locks.any?` doesn't cache the output and runs `SELECT 1 AS one
FROM "path_locks" WHERE project_id = N` each time. When there are thousands of
refs being pushed, this can time out the unicorn worker.

Closes #6465

Resolve "Use `long-arrow` icon in downstream pipeline instead of importing the svg into the vue component"

Closes #5538

See merge request gitlab-org/gitlab-ee!6132

Resolve "Assignee list UI should only appear in Premium or higher"

Closes #6474

See merge request gitlab-org/gitlab-ee!6171

Update read-only message banner styling for Geo secondary node

Closes #4966

See merge request gitlab-org/gitlab-ee!6135

Memoize the global default for push rules within the request

Closes #6465

See merge request gitlab-org/gitlab-ee!6160

CE upstream - 2018-06-18 15:21 UTC

Closes gitlab-runner#2211

See merge request gitlab-org/gitlab-ee!6170

Resolve "Geo: Slow JOIN query with project_repository_states"

Closes #6053

See merge request gitlab-org/gitlab-ee!5879

CE upstream - 2018-06-18 09:22 UTC

See merge request gitlab-org/gitlab-ee!6168

Allow trailing whitespace on blockquote fence lines

See merge request gitlab-org/gitlab-ce!19960

Redirect favicon.(png|ico) to actual favicon asset or upload

Closes #47840

See merge request gitlab-org/gitlab-ce!19956

Update README.md to clarify EFS is slow and not to use this guide.

See merge request gitlab-org/gitlab-ce!19852

Rails5 fix db check: connection execute returns integer instead of string

See merge request gitlab-org/gitlab-ce!19901

Merge branch 'blackst0ne-rails5-invalid-single-table-inheritance-type-group-is-not-a-subclass-of-namespace' into 'master'

Resolve "[Rails5] Invalid single-table inheritance type: Group is not a subclass of Namespace"

Closes #48014

See merge request gitlab-org/gitlab-ce!19918

Rails5 fix passing Group objects array into for_projects_and_groups milestone scope

Closes #48012

See merge request gitlab-org/gitlab-ce!19920

Document Custom build directories

Closes gitlab-runner#2211

See merge request gitlab-org/gitlab-ce!19664

fixed broken link to git cheat sheet

See merge request gitlab-org/gitlab-ce!19879

Resolve "Creating a deploy token doesn't bring back to the creation page"

Closes #46429

See merge request gitlab-org/gitlab-ce!19639