Update all gitlab CI templates from gitlab-org/gitlab-ci-yml for the last time

See merge request gitlab-org/gitlab-ce!21929

Add linting section to documentation guidelines

See merge request gitlab-org/gitlab-ce!21849

Update using_docker_build.md

See merge request gitlab-org/gitlab-ce!21927

Add diff_refs documentation in single merge requests response.

See merge request gitlab-org/gitlab-ce!21923

Added `chown git` to the backup tar to prevent permission denied errors.

See merge request gitlab-org/gitlab-ce!21724

CE Port (Refactor IDE to allow RightPane extension)

See merge request gitlab-org/gitlab-ce!21920

Extracts scroll position checks into reusable functions

See merge request gitlab-org/gitlab-ce!21931

Guard against a login attempt with invalid CSRF token

See merge request gitlab-org/gitlab-ce!21934

Adds css classes to aid GitLab-QA tests

See merge request gitlab-org/gitlab-ce!21935

Allow events filter to be set in the URL in addition to cookie

Closes #1801

See merge request gitlab-org/gitlab-ce!21557

Since we no longer maintain this separate repo we just needed to do one
final copy from there. See
https://gitlab.com/gitlab-org/gitlab-ce/issues/50289

Fixes performance bar looking for a key in a undefined prop

Closes #51569

See merge request gitlab-org/gitlab-ce!21887

Update vue, vue-template-compiler, and vue-loader

See merge request gitlab-org/gitlab-ce!21891

Remove DocToc frontmatter from published pages

See merge request gitlab-org/gitlab-ce!21944

Fix link to mitmproxy installation

See merge request gitlab-org/gitlab-ce!21947

**Why?**
- This is needed by the Web Terminal EE feature.
  https://gitlab.com/gitlab-org/gitlab-ee/issues/5426

**Notes:**
- RightPane component tabs is now data driven.

Merge branch '51522-add-new-project-via-import-by-url-auto-populates-slug-but-not-project-name' into 'master'

Resolve "Add new project via import by URL auto populates slug but not project name"

Closes #51522

See merge request gitlab-org/gitlab-ce!21770

- Also fix some markdown syntax.

Fix monitoring dashboard not resizing properly

See merge request gitlab-org/gitlab-ce!21730

Update grape to 1.1.0 to address a XSS vulnerability

Closes #51299

See merge request gitlab-org/gitlab-ce!21639

Fix import statement for the skeleton notes

See merge request gitlab-org/gitlab-ce!21940

Bump GitLab UI version and change the file imports to a single point of entry notation

See merge request gitlab-org/gitlab-ce!21937

Change vertical margin of page titles to 16px

See merge request gitlab-org/gitlab-ce!21888

If a user logs in with a bad CSRF token, the Warden before_logout
hook will be called with no valid user. This would lead to odd
Error 500 messages with a backtrace.

Addresses part of #50857

With the new Job Log page in Vue, we'll need to reuse the same functions for scrolling
that we're using in the jQuery one.
This page extracts that logic into reusable functions

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

Feature: Runner type filter for admin view

See merge request gitlab-org/gitlab-ce!19649

Update selectors for QA::Page::Group::Show

Closes #51893

See merge request gitlab-org/gitlab-ce!21925

Resolve "Un-vendor CI templates"

Closes #50289

See merge request gitlab-org/gitlab-ce!21902