Docs pages admin update

Closes #40849

See merge request gitlab-org/gitlab-ce!15769

Add old files to uploads table

See merge request gitlab-org/gitlab-ce!15270

Merge branch '40631-sidebar-icon-alignment-for-confidentiality-and-lock-issue-is-misaligned' into 'master'

Resolve "Sidebar icon alignment for confidentiality and lock issue is misaligned"

Closes #40631

See merge request gitlab-org/gitlab-ce!15692

Resolve "Dropdown options are misaligned"

Closes #40592

See merge request gitlab-org/gitlab-ce!15693

Resolve "Empty state for Changes tab in MR"

Closes #32329

See merge request gitlab-org/gitlab-ce!15611

Add chevron to create dropdown on repository page

Closes #39458

See merge request gitlab-org/gitlab-ce!15648

Resolve "/unlabel quick action - limit autocomplete to applied labels"

Closes #22680 and #27319

See merge request gitlab-org/gitlab-ce!11110

Close all open dropdowns when search input is clicked

Closes #35773

See merge request gitlab-org/gitlab-ce!15737

Bump redis-rails to 5.0.2 to get redis-store security updates

Closes #40889

See merge request gitlab-org/gitlab-ce!15773

Fixes long commit links breaking the commit list layout

Closes #36524

See merge request gitlab-org/gitlab-ce!15763

Later migrations added fields to the EE DB which were used by factories which were used in these specs.

And in CE on MySQL, a single appearance row is enforced.

The migration and migration specs should not depend on the codebase staying the same.

Fixes admin welcome states new group path

Closes #40645

See merge request gitlab-org/gitlab-ce!15761

Throttle the number of UPDATEs triggered by touch

Closes #34763

See merge request gitlab-org/gitlab-ce!15682

This throttles the number of UPDATE queries that can be triggered by
calling "touch" on a Note, Issue, or MergeRequest. For Note objects we
also take care of updating the associated "noteable" relation in a
smarter way than Rails does by default.

Fix graph notes number duplication.

See merge request gitlab-org/gitlab-ce!15696

Closes #36524

Closes #40645

Resolve "In Issue board url doesn't take in account hostname settings"

Closes #39364

See merge request gitlab-org/gitlab-ce!15703

[CE-Backport] Fix board filter when milestone is predefined

See merge request gitlab-org/gitlab-ce!15750

Downgrade the grpc gem to 1.4.5

See merge request gitlab-org/gitlab-ce!15746

Backport board scope highlight

See merge request gitlab-org/gitlab-ce!15757

Export template selector as ES6 modules

See merge request gitlab-org/gitlab-ce!15524

Generalize detail page headers (Issues, Merge Requests, Snippets)

Closes #40543

See merge request gitlab-org/gitlab-ce!15639

List multiple clusters

See merge request gitlab-org/gitlab-ce!15403

Make sure head pippeline always corresponds with an MR

Closes #37354

See merge request gitlab-org/gitlab-ce!14358

Resolve "SSH warning message appears in clone box"

Closes #40850

See merge request gitlab-org/gitlab-ce!15753

backport CE style for boards selector fade mask

See merge request gitlab-org/gitlab-ce!15624