CE Backport of "Don't create todos for old issue assignees"

See merge request gitlab-org/gitlab-ce!14765

Don't show an "Unsubscribe" link in snippet comment notifications

Closes #23888

See merge request gitlab-org/gitlab-ce!14764

Make use of a `gitlab-qa-sandbox` group if available

See merge request gitlab-org/gitlab-ce!14682

Fixed default group sort option

Closes #38808

See merge request gitlab-org/gitlab-ce!14728

Fix the number representing the amount of commits related to a push event

Closes #37483

See merge request gitlab-org/gitlab-ce!14103

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

# Conflicts:
#   spec/features/dashboard/group_spec.rb

Create fork networks for root projects that are deleted

Closes #38905

See merge request gitlab-org/gitlab-ce!14752

Replaces `tag: true` into `:tag` in the specs

Closes #37552

See merge request gitlab-org/gitlab-ce!14653

Do not retry jobs that are allowed to fail

See merge request gitlab-org/gitlab-ce!14757

Updated Icons + Fix for Collapsed Groups Angle

See merge request gitlab-org/gitlab-ce!14754

Removes CommitsList from global namespace

See merge request gitlab-org/gitlab-ce!14735

Improve internationalization docs

See merge request gitlab-org/gitlab-ce!14570

Convert AbuseReports class to a module

See merge request gitlab-org/gitlab-ce!14709

Resolve "Simple documentation update - backup to restore in restore section"

Closes #38840

See merge request gitlab-org/gitlab-ce!14720

Remove AjaxLoadingSpinner and CreateLabelDropdown from global namespace

See merge request gitlab-org/gitlab-ce!14738

Include GitLab full name with username in Slack messages

Closes #38865

See merge request gitlab-org/gitlab-ce!14740

Improve pgloader documentation

See merge request gitlab-org/gitlab-ce!14733

Move cycle analytics banner into a vue file

See merge request gitlab-org/gitlab-ce!14690

Remove executable permissions on images to make docs lint happy

See merge request gitlab-org/gitlab-ce!14750

Fix error with GPG signature updater when commit was deleted

Closes #38890

See merge request gitlab-org/gitlab-ce!14749

Normalize LDAP user DNs (downcase and remove excess spaces)

See merge request gitlab-org/gitlab-ce!14697

[ci skip]

Remove old navigation CSS

See merge request gitlab-org/gitlab-ce!14573