Add nested groups documentation

Closes #28761

See merge request !9783

Resolve "Document U2F limitations with multiple URLs"

Closes #28277

See merge request !9300

Added issue boards re-ordering docs

See merge request !9924

Fix typo on Milestones show page. Fixes #29214

Closes #29214

See merge request !9913

Fix typo in doc/development/polling.md: `If-None-Modified` -> `If-None-Match`

See merge request !9957

Allow to override GITLAB_GIT_TEST_REPO_URL to specify a different gitlab-git-test repo

Closes #27551

See merge request !9945

Speed up the issues/filtered_search/dropdown_author feature spec

See merge request !9951

Add a test which would rollback db and migrate again

Closes #29106

See merge request !9908

[ci skip]

Display full project name with namespace upon deletion

Closes #29469

See merge request !9955

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

Fixing two migrations that could not be rolled back

See merge request !9953

* Removes ambiguity when two projects exist with the same name

when rolling back from 9-0-stable to 8.17.3

Fix link togglers jumping to top

Closes #29414

See merge request !9943

Toggle long Project names

Closes #28187

See merge request !9501

[ci skip]

Preserve order by priority on issues board

See merge request !9939

[ci skip]

[ci skip]

[ci skip]

Add performance/scalability concerns to CONTRIBUTING.md

See merge request !8677

Fix first line markdown helper for user profile activity stream

Closes #29425

See merge request !9920

Fix intermittent spec failures in notify_spec.rb

See merge request !9935

Resolve "Cancel button misaligned in New Application page"

Closes #29441

See merge request !9933

Remove unused satellites config

See merge request !9919

We will set this to the dev mirror in GitLab CE and EE on dev.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Syshook documentation updated

See merge request !9893

Added filtered search bar to issue boards

Closes #28312

See merge request !9757

Use google-protobuf 3.2.0.1

Closes #29084

See merge request !9932

Include instructions to update /etc/default/gitlab

See merge request !9925

Fix relative position calculation

Closes #29269

See merge request !9837

Fix #29414

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/29425