Use `:empty_project` in worker, view, task, serializer, policy, migration, and mailer specs

See merge request !10272

Cleanup application settings spec

See merge request !10189

Fix production admin fixture to use the new `Users::CreateService`

Closes #30248

See merge request !10326

Fix linking to new issue with selected template

Closes #26595

See merge request !10155

Create todos only for new mentiones

Closes #28799

See merge request !10279

Update docs regarding visibility lib

See merge request !10295

bumps gitlab shell version

See merge request !10329

Test docs internal links check

See merge request !9509

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

Add metadata for system notes

See merge request !9964

Prevent private group disclosure via parent_id

See merge request !2077

Use full path for moving directories when changing namespace path

See merge request !2078

Reset container width when switching to pipelines MR tab

Closes #29539

See merge request !10169

Resolve "Simplify milestone summary"

Closes #23674

See merge request !10096

Add shortcuts and counters to MRs and issues in navbar

Closes #29866

See merge request !10314

[ci skip]

Remove jQuery from IPython notebook viewer

See merge request !10315

Fix admin projects page in admin area

See merge request !10277

Fix custom protected branch pattern jumping scroll position to top

Closes #30149

See merge request !10275

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/26595

Fixed inner page tabs not being scrollable

Closes #18853

See merge request !10204

don't pad hidden sidebar on build and wiki pages

Closes #29830

See merge request !10199

Make bundle exec rake gitlab:check RAILS_ENV=production

Closes #30084

See merge request !10246

Update copy for first row in filtered search dropdown

Closes #29828

See merge request !10138

One Gitaly connection per storage shard

See merge request !10150

Make ChatNames::FindUserService stable by not checking a precise time

Closes #29832

See merge request !10306

Added initial todo functionality to collapsed sidebar

Closes #24805

See merge request !7827

Fix API group/issues default state filter

Closes #23655

See merge request !10253