Doesn't synchronize default branch for push mirrors

Closes #51725

See merge request gitlab-org/gitlab-ce!21861

Align form labels following Bootstrap 4 docs

See merge request gitlab-org/gitlab-ce!21752

We should not synchronize the source repository with
the target root ref while updating a push mirror.

Correct grammar (setup to set-up) in Docs

See merge request gitlab-org/gitlab-ce!21857

Allows to sort projects by most stars

Closes #47203

See merge request gitlab-org/gitlab-ce!21762

Cycle Analytics - Fix broken feature page link

See merge request gitlab-org/gitlab-ce!21855

Rename some css classes that are shared between issues and mrs

See merge request gitlab-org/gitlab-ce!21856

Add note about projects when user is deleted

See merge request gitlab-org/gitlab-ce!21843

Fix leading slash in redirects and add cop

Closes #37423 and #50645

See merge request gitlab-org/gitlab-ce!21828

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Correct Gitlab Capitalization in code files

See merge request gitlab-org/gitlab-ce!21841

Merge branch '47398-user-is-unable-revoke-a-authorized-application-unless-user-oauth-applications-is-checked-in-admin-settings' into 'master'

Resolve "User is unable revoke a Authorized application unless User OAuth applications is checked in admin settings"

Closes #47398

See merge request gitlab-org/gitlab-ce!21835

[ci skip]

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fix activity titles for MRs in chat notification services

Closes gitlab-ee#5325

See merge request gitlab-org/gitlab-ce!21834

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fix long webhook URL overflow for custom integration

Closes #41040

See merge request gitlab-org/gitlab-ce!21668

Gitaly servers require the GitLab Shell secret

See merge request gitlab-org/gitlab-ce!21847

Fix broken link to modal component source

See merge request gitlab-org/gitlab-ce!21830

Enable frozen string in app/controllers/**/*.rb

See merge request gitlab-org/gitlab-ce!21736

Add Fog use_iam_profile option to docs

See merge request gitlab-org/gitlab-ce!21844

Add Gitlab::Database::Subquery.self_join to delete_all with limit

See merge request gitlab-org/gitlab-ce!21839

Update wiki upload documentation

See merge request gitlab-org/gitlab-ce!21815

Add webhook branch filtering docs

See merge request gitlab-org/gitlab-ce!21816

QA: Fix failure in merge_merge_request_from_fork_spec.rb

Closes #51657

See merge request gitlab-org/gitlab-ce!21817

Move the cloud-native-image trigger job into the test stage

See merge request gitlab-org/gitlab-ce!21819