Add gitlab-ui skeleton loading

See merge request gitlab-org/gitlab-ce!21871

Update doc/user/project/repository/index.md

See merge request gitlab-org/gitlab-ce!21898

Troubleshoot "Transient failure in qa/specs/features/project/fork_project_spec.rb"

See merge request gitlab-org/gitlab-ce!21858

Enable more frozen string in app/controllers/

See merge request gitlab-org/gitlab-ce!21873

CE port of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/6906

See merge request gitlab-org/gitlab-ce!21903

Fix committer typo

Closes #51808

See merge request gitlab-org/gitlab-ce!21899

Fix margins in merge request header

Closes #51726

See merge request gitlab-org/gitlab-ce!21878

[CE] Improve review apps

See merge request gitlab-org/gitlab-ce!21087

Render 412 when invalid UTF-8 is passed as parameter

See merge request gitlab-org/gitlab-ce!21774

Add clean-up phase for ScheduleDiffFilesDeletion migration

Closes #51469

See merge request gitlab-org/gitlab-ce!21734

QA: Allow registration when LDAP is enabled

See merge request gitlab-org/gitlab-ce!21846

`.has_personal_area?` waits for sign in but does not ensure that it's
successful. Raise an exception if not successful so we can capture
a screenshot at the point of failure

Adds a workaround and code to help troubleshoot why a new user doesn't
stay signed in after loading a project page.

Enable the ability to use the force env for rebuilding authorized_keys during a restore

See merge request gitlab-org/gitlab-ce!21896

Remove stage/unstage buttons from IDE commit list items

Closes #51695

See merge request gitlab-org/gitlab-ce!21845

We started syncing all the wiki regardless of the fact it's disabled or
not. We couldn't do that in one stage because of needing of smoth update
and deprecating things. This is the second stage that finally removes
unused columns in the geo_node_status table.

Cleanup polling of merge request widget in tests

Closes gitlab-ee#7728

See merge request gitlab-org/gitlab-ce!21906

Process any remaining ScheduleDiffFilesDeletion workers and remove
temporary added index.

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

Fast lookup of authorized SSH keys in the database was ported to CE in
v10.4. This change adds the option to enable the setting via the restore
rake task and assumes yes if the force env variable is set.

CE port of Adding state to epics

See merge request gitlab-org/gitlab-ce!21771

Resolve "gitlab.com: Unable to import a project that was just exported"

Closes #43840, #43896, and #51747

See merge request gitlab-org/gitlab-ce!21875

Add clarity to EE feature styles for features introduced before and after 9.2

See merge request gitlab-org/gitlab-ce!21874

Resolve "Provide NullStore for RequestStore"

Closes #51718

See merge request gitlab-org/gitlab-ce!21848

Postgres alignment padding – logic fixed

See merge request gitlab-org/gitlab-ce!21764

Update ldap.md If you escape the '\' character when using a "domain\user" scheme for the bind_dn name, it will fail. gitlab-ctl reconfigure escapes characters, and if you pre-escape the '\', the resultant yaml file will have four (4) '\' characters

See merge request gitlab-org/gitlab-ce!20460

use redirect instead of render to avoid creating keys when refresh - resolves #47942

Closes #47942

See merge request gitlab-org/gitlab-ce!20363

Update frontend tooling dependencies

See merge request gitlab-org/gitlab-ce!21818

Refactor IDE index to support EE specific code

See merge request gitlab-org/gitlab-ce!21895

Use Vue component for job artifacts, Commit and Trigger Variables

See merge request gitlab-org/gitlab-ce!21777

Remove background job throttling feature

Closes #51509

See merge request gitlab-org/gitlab-ce!21748

**Why?**

- The web terminal feature is EE specific and will need to inject
  some specific options / functions into certain components.

Backport of js and vue files from closing epics