Add more introductory information to Review Apps page, and other refactoring.

Closes #50509

See merge request gitlab-org/gitlab-ce!21632

Avoid close icon leaving the modal header

See merge request gitlab-org/gitlab-ce!21904

Align collapsed sidebar avatar container

See merge request gitlab-org/gitlab-ce!22044

Use minimum recommended PostgreSQL version to run our tests

See merge request gitlab-org/gitlab-ce!22060

Danger checks for the frontend

See merge request gitlab-org/gitlab-ce!21859

Docs quick actions - CE

See merge request gitlab-org/gitlab-ce!22058

Port UpgradeCommand to CE

See merge request gitlab-org/gitlab-ce!21949

CE Resolve "Refactor code quality similar to JUnit tests"

See merge request gitlab-org/gitlab-ce!21932

Resolve ""update_column_in_batches can not be run inside a transaction" during upgrade to 11.3"

Closes #51782

See merge request gitlab-org/gitlab-ce!22055

Hides Close MR button on merged MR

Closes #50161

See merge request gitlab-org/gitlab-ce!21840

[QA] Improve admin hashed-storage settings

See merge request gitlab-org/gitlab-ce!22045

Port of EE translations

See merge request gitlab-org/gitlab-ce!22052

Show the commit-sha for pre-release versions

Closes #52050

See merge request gitlab-org/gitlab-ce!22026

[Backport] Suggest approvers based on code owners

See merge request gitlab-org/gitlab-ce!21918

New Crowdin translations

See merge request gitlab-org/gitlab-ee!7492

When a Merge request is merged, shows only the Report abuse menu item
in the dropdown menu instead of showing the close_reopen_report toggle
with an unusable Close button.
The Report abuse is still hidden when the author of the Merge request
is the current_user.

Hides the Reopen button on a closed and locked issue when the
issue.author is not the current_user

The pre-release tags are set at the beginning of a release, so it
would be impossible to figure out which version was running if we're
running nightlies.

In that case it's better to still link to the SHA. These versions
don't get deployed to .com.

Resolve "Add "Link" shortcut/icon in markdown editor to make it easier to add references"

Closes #44627

See merge request gitlab-org/gitlab-ce!18579

Make single diff patch limit configurable

Closes #48027

See merge request gitlab-org/gitlab-ce!21886

Update Workhorse to 7.0.0 for Gitaly's new auth scheme

Closes gitaly#1319

See merge request gitlab-org/gitlab-ce!22037

QA: Optimize groups filter

See merge request gitlab-org/gitlab-ce!21994

Backport styles for report_section

See merge request gitlab-org/gitlab-ce!21954

Highlight current user in comments

Closes #49036

See merge request gitlab-org/gitlab-ce!21406

Use tiller locally for Auto Devops

Closes #51942

See merge request gitlab-org/gitlab-ce!22036

Improve logging when username update fails due to registry tags

See merge request gitlab-org/gitlab-ce!22038

When a user cannot be renamed due to existing container registry tags, log the
namespace and an example project that has tags.

This was introduced by https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/7371
for which no QA was run, even though QA files were changed.

This is a follow-up to
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/7531.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Filter issues without an Assignee via the API

Closes #41205

See merge request gitlab-org/gitlab-ce!22009

circumvent browser cache on browser back navigation

Closes #50928

See merge request gitlab-org/gitlab-ce!22006