Fix a failing Rubocop rule on master

Closes #31458

See merge request !10947

Add GitLab version to backup file name

See merge request !10901

Bump Sidekiq to 5.0.0

See merge request !10943

correct documentation on opt-out-ness of usage ping

See merge request !10945

Resolve "Jobs dropdown in mini graph should close when we receive an error"

Closes #31335

See merge request !10887

http://rubular.com/r/op7TI9UX6K

Submodule Dockerfile templates

See merge request !10663

Replace header merge request icon

Closes #31088

See merge request !10932

Use rspec-set to speed up examples

See merge request !10551

Work around a hard-to-understand failure in `CacheMarkdownField`

See merge request !10918

Add updated time to project list

Closes #26509

See merge request !8514

Reorg CE Docs landing page

Closes #31069

See merge request !10754

[#22826] Ensure find_file_link and download button is part of file tree header

Closes #22826

See merge request !9847

Support preview_markdown action for personal_snippets

See merge request !10810

Load a project's CI status in batch from redis

Closes #27376

See merge request !10785

[ci skip]

Wait for AJAX after steps defined in SharedActiveTab

Closes #31439

See merge request !10935

Add issues/:iid/closed_by api endpoint

Closes #26437

See merge request !10511

Refactoring rake task to import GitHub repositories

See merge request !10695

More merge request filters

Closes #26301

See merge request !10924

This manually merges https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10874
into master after resolving conflicts.

Decrease ABC threshold to 57.08

See merge request !10724

Decrease Cyclomatic Complexity threshold to 16

See merge request !10928

Don't expect underlying DB data to be updated in feature spec

Closes #31437

See merge request !10934

Assignee filter on group issues/merge requests only loads group users

Closes #29490

See merge request !10884

Change issues sentence to use natural sorting

Closes #20378

See merge request !7110

Skip issuable without a project in IssuableExtractor#extract

Closes #31280

See merge request !10906