Add a test which would rollback db and migrate again

Closes #29106

See merge request !9908

Display full project name with namespace upon deletion

Closes #29469

See merge request !9955

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

Preserve order by priority on issues board

See merge request !9939

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

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

Resolve "Use the v4 API from the frontend"

Closes #28864

See merge request !9714

Store capybara screenshots as build artifacts

Closes #13971

See merge request !7985

Remove explicit `require` calls, and use `require_dependency` when needed

Closes #29389

See merge request !9899

Adds best practices regarding context and vue to documentation

See merge request !9870

Update using_docker_images.md

See merge request !9894

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9908#note_25331127

Take nonewline context into account in diff parser

Closes #28128 and #22636

See merge request !9705

Improve fragment caching rules at projects dashboard

Closes #28364

See merge request !9895

Used to be `btn-default`, change it to `btn-cancel`

Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9908#note_25324225