Add Noto Color Emoji font support

See merge request gitlab-org/gitlab-ce!19036

This is a font from [Google](https://www.google.com/get/noto/).

Arch Linux [has a recommendation of it](https://wiki.archlinux.org/index.php/fonts#Emoji_and_symbols).

Add info about this into `docs/user/markdown.md#emoji`

Added docs for Web IDE Client Evaluation

Closes #50143

See merge request gitlab-org/gitlab-ce!21155

Improve visuals of language bar on projects

See merge request gitlab-org/gitlab-ce!21006

Resolve "`Copy to Clipboard` tooltip appears under modal"

Closes #41996

See merge request gitlab-org/gitlab-ce!21017

Fixed small scroll area in Web IDE

Closes #50242

See merge request gitlab-org/gitlab-ce!21160

Fix logins via OAuth2 geting logged out in an hour

Closes #50210

See merge request gitlab-org/gitlab-ce!21144

Fix pipeline fixture seeder

See merge request gitlab-org/gitlab-ce!21088

Resolve "Auto DevOps: Pass proxy variables to build environments"

Closes #50243

See merge request gitlab-org/gitlab-ce!21159

Optimize querying User#manageable_groups

See merge request gitlab-org/gitlab-ce!21050

Resolve "`/tag` quick action on Commit comments"

Closes #45663

See merge request gitlab-org/gitlab-ce!20694

See https://gitlab.com/gitlab-org/gitlab-ci-yml/merge_requests/184

Thanks to @kinolaev for this contribution.

Get the `merge-base` of 2 refs trough the API

Closes #49850

See merge request gitlab-org/gitlab-ce!20929

Closes #50242

Improve terminal button on job log page

See merge request gitlab-org/gitlab-ce!21094

This adds an endpoint to get the common ancestor of 2 refs from the API.

Fix specs failing on duplicate gpg signature

Closes #50224

See merge request gitlab-org/gitlab-ce!21152

Update diff docs regarding note diff file usage

See merge request gitlab-org/gitlab-ce!21137

Creates vue component for warning block about stuck runners

See merge request gitlab-org/gitlab-ce!21114

Added tooltips to tree list header buttons in Web IDE

Closes #50141

See merge request gitlab-org/gitlab-ce!21138

Fixed Web IDE live preview not hot reloading

Closes #50231

See merge request gitlab-org/gitlab-ce!21141

Add documentation on how to test on older firefox versions

See merge request gitlab-org/gitlab-ce!20842

Backstage/ide router refactoring

See merge request gitlab-org/gitlab-ce!21142

Closes #50143

It seems there are additional async requests related to gpg
signature, w/o waiting for finishing all requests it fails on:
Duplicate entry '...' for key 'index_gpg_signatures_on_commit_sha'

fix design artifact label to be product discovery. Was done here…

See merge request gitlab-org/gitlab-ce!21135

Bugs and regression triage and prioritization process

See merge request gitlab-org/gitlab-ce!20623

Reorganize variables.scss, Part 1

See merge request gitlab-org/gitlab-ce!21118

Users without GitLab 2FA enabled would be logged out after an hour
due to a regression in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20700.

The OAuth2 controller sets the current_user after the controller is finished, so
we should only limit session times after this has been done.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/50210

Resolve "Add missing i18n strings to issue boards."

Closes #50063

See merge request gitlab-org/gitlab-ce!21081

Merge branch '47752-buttons-on-new-file-page-wrap-outside-of-container-for-long-branch-names' into 'master'

Resolve "Buttons on new file page wrap outside of container for long branch names"

Closes #47752

See merge request gitlab-org/gitlab-ce!21015