Create system notes only if issue was successfully related to another

Closes gitlab-ce#36443

See merge request !2684

Repo editor with flex layout -- EE merge edition

See merge request !2700

Improves handling of the mirror threshold

Closes #3134

See merge request !2671

Add metrics for BitBucket and GitHub API calls

See merge request !2661

Improves handling of stuck projects

Closes #3108

See merge request !2628

Support handling of rename events in Geo Log Cursor

See merge request !2615

Use rugged_is_ancestor? instead of Gitaly when it is called inside a loop

Closes gitlab-com/infrastructure#2138

See merge request !2696

Port of dispatcher-race-condition-fix to EE

See merge request !2643

[EE] Whitelist or fix additional `Gitlab/PublicSend` cop violations

See merge request !2662

Remove ignore column lines

See merge request !2677

[EE] Enable Layout/TrailingWhitespace cop and auto-correct offenses

See merge request !2686

Fix time travelling tests.

See merge request !2691

Fix Copy to Clipboard for SSH Public Key on Pull Repository settings

Closes #3167

See merge request !2692

Fix admin sidebar menu items

Closes #3175

See merge request !2689

Update wording and clarification of approvals

See merge request !2676

Merge branch '36405-fix-mysql-timestamp-columns' into 'master'

Closes gitlab-ce#36405

See merge request !2688

Resolve "Code quality styles missing"

Closes #3162

See merge request !2678

Many Repo Fixes -- EE merge edition

See merge request !2679

Make sure MySQL would not use CURRENT_TIMESTAMP as the default for timestamp columns

Closes #36405

See merge request !13560

CE Upstream - Monday

Closes #3121, gitlab-ce#31706, gitlab-ce#36066, and gitlab-ce#31698

See merge request !2674

Document creating new issue from the group-level Issue Tracker.

Closes gitlab-ce#36375

See merge request !2687

EE counterpart for CE MR !13360

See merge request !2675

Conflicts:
	app/assets/javascripts/repo/components/repo_edit_button.vue
	app/assets/javascripts/repo/components/repo_editor.vue
	app/assets/javascripts/repo/components/repo_tab.vue
	app/assets/javascripts/repo/components/repo_tabs.vue
	app/assets/javascripts/repo/helpers/repo_helper.js
	app/assets/javascripts/repo/services/repo_service.js
	app/assets/javascripts/vue_shared/components/popup_dialog.vue
	app/assets/stylesheets/pages/repo.scss
	app/views/shared/repo/_repo.html.haml
	spec/javascripts/repo/components/repo_edit_button_spec.js

Introduced in
https://gitlab.com/gitlab-org/gitlab-ce/commit/715ecfab2f6b34d77e206859a95eae269e4c0d52

Introduced in
https://gitlab.com/gitlab-org/gitlab-ce/commit/e9f557054869772955f86de3ac8138c7fc020564

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