Update installation and upgrade guides to use Ruby 2.3.6

See merge request gitlab-org/gitlab-ce!16038

Do not show Vue pagination if only one page

Closes #33609

See merge request gitlab-org/gitlab-ce!15999

Added 'admin' persona

See merge request gitlab-org/gitlab-ce!15470

Docs: move article Artifactory + GL to subject-related folder

See merge request gitlab-org/gitlab-ce!16081

Fixed diff_worker not compiling correctly

Closes #41182

See merge request gitlab-org/gitlab-ce!15966

Refactor user, project and group docs when changing namespace

See merge request gitlab-org/gitlab-ce!16019

- move the section
- replace identifiers with inline links
- update settings (General settings > Advanced settings)

Skip projects filter on merge requests search

See merge request gitlab-org/gitlab-ce!15955

Properly name webpack chunks for dynamic imports

See merge request gitlab-org/gitlab-ce!16066

Reduce cardinality of some of GitLab's Prometheus metrics and fix observed duration reporting.

Closes #41045

See merge request gitlab-org/gitlab-ce!15881

Fall back to the `MergeRequestWidgetEntity`

Closes #41296

See merge request gitlab-org/gitlab-ce!16074

Resolve "Decouple multi-file editor from file list"

Closes #40040 and #40032

See merge request gitlab-org/gitlab-ce!15430

When searching for merge requests, an additional subquery
is added which by default filters only merge requests which belong
to source or target project user has permission for.

This filter is not needed because more restrictive filter
which checks if user has permission for target project
is used in the query.

So unless a custom projects filter is used by user, it's possible
to skip the default projects filter and speed up the final query.

Related to #40540

organise content by subject

See merge request gitlab-org/gitlab-ce!16080

When no serializer was passed.

LDAP extern_uids are not normalized when updated via API

Closes #40279

See merge request gitlab-org/gitlab-ce!16004

Add CI YML example for Browser Performance Testing in CE

See merge request gitlab-org/gitlab-ce!16058

Resolve "Docker volumes not mounted when using docker:dind"

See merge request gitlab-org/gitlab-ce!16070

Restore missing language code in datetime_utility.js

Closes #41248

See merge request gitlab-org/gitlab-ce!16009

Remove two unused step definitions from spinach

See merge request gitlab-org/gitlab-ce!16047

Hide toolbar in markdown preview mode

Closes #40063

See merge request gitlab-org/gitlab-ce!15994

Add support for defining explicit dependencies to QA factories

Closes gitlab-qa#122

See merge request gitlab-org/gitlab-ce!15979

Remove a redundant `InvalidPathError` definition

See merge request gitlab-org/gitlab-ce!16064

Add new last_commit_id param for create commit endpoint

Closes #38356

See merge request gitlab-org/gitlab-ce!15922

Enables ordering groups and their children by name in the web interface

Closes #24962 et #36958

See merge request gitlab-org/gitlab-ce!16045

Fix racing condition in Ajax call of merge_request_tabs_spec.js

Closes #35294

See merge request gitlab-org/gitlab-ce!16012

Merge branch '41291-spec-failure-on-spec-features-merge_requests-image_diff_notes_spec-rb' into 'master'

Fix a failure because we stub DiffHelper#diff_file_blob_raw_path instead of #diff_file_blob_raw_url

Closes #41291

See merge request gitlab-org/gitlab-ce!16052