Added skeleton loading paradigm to UX guide

Closes gitlab-design#35

See merge request gitlab-org/gitlab-ce!14556

Resolve "Precompiled assets with digest strings are ignored in CI"

Closes #38598

See merge request gitlab-org/gitlab-ce!14583

Fixed commit avatar being aligned vertically

Closes #38411

See merge request gitlab-org/gitlab-ce!14587

Fix navigation dropdown close animation on mobile screens

Closes #38502

See merge request gitlab-org/gitlab-ce!14649

Add (partial) index on Labels.template

See merge request gitlab-org/gitlab-ce!14530

Fix gitaly-proto version in Gemfile.lock

See merge request gitlab-org/gitlab-ce!14651

Add grpc.log for Gitaly

See merge request gitlab-org/gitlab-ce!14632

[ci skip]

Add documentation to summarise project archiving

Closes #35919

See merge request gitlab-org/gitlab-ce!14650

Remove edit action for issues

Closes #36670

See merge request gitlab-org/gitlab-ce!14523

Bump gitaly-proto version to v0.39.0

See merge request gitlab-org/gitlab-ce!14638

Git ignore po files ending in time_stamp

See merge request gitlab-org/gitlab-ce!14615

Fixes merge request widget date tooltip inconsistencies

Closes #38545

See merge request gitlab-org/gitlab-ce!14578

Only copy old/new code when selecting left/right side of parallel diff

See merge request gitlab-org/gitlab-ce!14561

Fix broken certificate-authority-data with kubectl >= 1.8.0

Closes #38685

See merge request gitlab-org/gitlab-ce!14635

Update GitLab Pages to v0.6.0

See merge request gitlab-org/gitlab-ce!14630

Resolve "Cannot rename a hashed project"

Closes #38202

See merge request gitlab-org/gitlab-ce!14428

Improve performance of filtering notes in NotesController

See merge request gitlab-org/gitlab-ce!14645

Add "implements" to the default issue closing message regex

Closes #38424

See merge request gitlab-org/gitlab-ce!14612

Move Fast-Forward Merge to CE

See merge request gitlab-org/gitlab-ce!14272

Fix for Gitaly nil encoding issue

See merge request gitlab-org/gitlab-ce!14581

Send extra Gitaly params for `send_git_archive` if needed

See merge request gitlab-org/gitlab-ce!14605

Whitelist authorized_keys.lock in the gitlab:check rake task

Closes #38635

See merge request gitlab-org/gitlab-ce!14624

Reduces the number of queries needed to redact notes to which
the user does not have access. Also includes an N+1 query test
as a guard against future issues.

This is a follow-up from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/14327#note_40976854.