Remove more variable reassignments and unused styles

See merge request gitlab-org/gitlab-ce!21262

Add documentation about reading query plans

See merge request gitlab-org/gitlab-ce!21199

Blacklist the use of destroy_all

See merge request gitlab-org/gitlab-ce!21250

GitHub importer: Keep track of internal_ids

Closes #49754

See merge request gitlab-org/gitlab-ce!20926

replace nobootwait with nofail

See merge request gitlab-org/gitlab-ce!21269

Bump Gitaly to 0.117.1 for Rouge update

See merge request gitlab-org/gitlab-ce!21277

This adds a database guide on how to read the output of "EXPLAIN" and
"EXPLAIN ANALYZE", and how to use this output to understand a query's
performance and optimise it.

Fix SiteStatistics wikis_count

See merge request gitlab-org/gitlab-ce!21030

Mention how to override CE class methods

See merge request gitlab-org/gitlab-ce!21276

Creates vue components for stage dropdowns and job list container for job log view

See merge request gitlab-org/gitlab-ce!21255

Resolve "Project deletion may not log audit events during user deletion"

Closes #49796

See merge request gitlab-org/gitlab-ce!21248

Remove some duplicate tests and fix some typos

See merge request gitlab-org/gitlab-ce!21246

See https://gitlab.com/gitlab-org/gitlab-ce/issues/49446.

Remove feature flags for UserUpdateBranch

Closes gitaly#1246 and gitaly#1310

See merge request gitlab-org/gitlab-ce!21238

Fixed Web IDE live preview crashing when loading from merge request

Closes #50392

See merge request gitlab-org/gitlab-ce!21252

Fix mirror settings anchor

See merge request gitlab-org/gitlab-ce!21261

Creates Vue component for commit block in job log view

See merge request gitlab-org/gitlab-ce!21249

Creates Vue component for trigger variables block in job log page

See merge request gitlab-org/gitlab-ce!21244

missed in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/16985

Docs: update Pages IP address change + other DNS updates

See merge request gitlab-org/gitlab-ce!21259

doc: ci/yaml expire_in: the value is in seconds

See merge request gitlab-org/gitlab-ce!20983

Rails5: Enable verbose query logs

See merge request gitlab-org/gitlab-ce!21231

Add note about Noto Color Emoji font support by default

See merge request gitlab-org/gitlab-ce!21251

Update Rouge to 3.2.1. Includes a critical fix for the Perl Lexer

See merge request gitlab-org/gitlab-ce!21263

Fix 1px cutoff of emojis

Closes #47913

See merge request gitlab-org/gitlab-ce!21180

In modern Linux distros.

Source: https://www.omgubuntu.co.uk/2018/06/use-emoji-linux-ubuntu-apps

We don't test any specific string generated by it yet, so there is no
point in keeping it enabled when we are disabling it everywhere we test its output.

Add when the hangouts integration was introduced

See merge request gitlab-org/gitlab-ce!21257