CE upstream - Thursday

Closes gitlab-ce#42158

See merge request gitlab-org/gitlab-ee!4156

Fix duplicate item in protected branch/tag dropdown -- EE merge edition

Closes gitlab-ce#42157 and gitlab-ce#41989

See merge request gitlab-org/gitlab-ee!4137

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/42157
Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/41989

Refactor dispatcher project mr edit and creation diff path (EE)

See merge request gitlab-org/gitlab-ee!4032

dynamic imports for groups: pages

See merge request gitlab-org/gitlab-ee!3989

Use last_edited_at instead of updated_at for displaying issuable last change

See merge request gitlab-org/gitlab-ee!4042

[EE] Make the 'Edit' links consistent in the issuable sidebar

See merge request gitlab-org/gitlab-ee!4155

Remove a duplicated spec describe block

See merge request gitlab-org/gitlab-ee!4154

Upgraded Karma Dependencies- EE Port

See merge request gitlab-org/gitlab-ee!4136

[EE] Improve MR feature specs and reduce duplication

See merge request gitlab-org/gitlab-ee!3849

Add release added and release backported to CE

See merge request gitlab-org/gitlab-ee!4147

Update CWP pages

See merge request gitlab-org/gitlab-ee!4123

Add Web IDE docs

See merge request gitlab-org/gitlab-ee!4153

Port changes from gitlab-ce!16555 to EE

See merge request gitlab-org/gitlab-ee!4151

# Conflicts:
#	app/assets/javascripts/dispatcher.js
#	app/assets/javascripts/pages/projects/edit/index.js
#	app/assets/javascripts/projects/project_new.js

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Reduce UPDATEs for background column type changes

Closes #42158

See merge request gitlab-org/gitlab-ce!16551

Docs for [Geo] Docker Registry replication

See merge request gitlab-org/gitlab-ee!3632

Signed-off-by: Rémy Coutable <remy@rymai.me>

Add cache clearing documentation

Closes #41940

See merge request gitlab-org/gitlab-ce!16559

Add cache clearing documentation

See merge request gitlab-org/gitlab-ee!4152

Remove unnecessary query from labels dropdown

Closes #37143

See merge request gitlab-org/gitlab-ce!16520

Merge branch '4632-move-ee-specific-models-and-serializers-to-ee-app-models-serializers-directory' into 'master'

Resolve "Move EE-specific models and serializers to `ee/app/{models,serializers}` directory"

Closes #4632

See merge request gitlab-org/gitlab-ee!4131

Resolve "Pipeline stages are jumping when dropdown is open"

Closes #41806

See merge request gitlab-org/gitlab-ce!16556

Ee dispatcher projects

See merge request gitlab-org/gitlab-ee!4117

Added dispatcher imports for some project routes

See merge request gitlab-org/gitlab-ce!16389

CE upstream - Thursday

Closes gitaly#923

See merge request gitlab-org/gitlab-ee!4150

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