Update CONTRIBUTING.md to port Contribution Flow section from EE doc

See merge request gitlab-org/gitlab-ce!20546

Resolve "Improve performance of MR Changes tab: reduce event listeners on scroll event"

Closes #48639 and #48789

See merge request gitlab-org/gitlab-ce!20558

Remove old service architecture from Vue docs

See merge request gitlab-org/gitlab-ce!20579

Adding spec to test basic forking functionalities

See merge request gitlab-org/gitlab-ce!20097

Resolve "Follow-up from "Milestone tests""

Closes #48690

See merge request gitlab-org/gitlab-ce!20563

Add manifest import

See merge request gitlab-org/gitlab-ce!20304

Add examples for array and hash type API params

See merge request gitlab-org/gitlab-ce!20574

Optimize ProjectWiki#empty? check

See merge request gitlab-org/gitlab-ce!20573

i18n: externalize strings from 'app/views/explore'

See merge request gitlab-org/gitlab-ce!19713

Docs: fix typo on EKS doc

Closes #47421

See merge request gitlab-org/gitlab-ce!20582

Add a fast_timeout for the `ServerService.ServerInfo` endpoint

Closes #49116

See merge request gitlab-org/gitlab-ce!20552

Update project_import_export.md to include example remote import script and additional curl command

See merge request gitlab-org/gitlab-ce!20529

Revert "Log push output on exception" because it is no longer needed

See merge request gitlab-org/gitlab-ce!20564

Match against having letters and numbers for environment name

See merge request gitlab-org/gitlab-ce!20570

Remove Repository#path memoization

See merge request gitlab-org/gitlab-ce!20491

Resolve "do not set updated_at when creating note"

Closes #46930

See merge request gitlab-org/gitlab-ce!20322

Improvements to new entry dropdowns in Web IDE

Closes #44845

See merge request gitlab-org/gitlab-ce!20526

Fix Dangerfile failing on CHANGELOG check

See merge request gitlab-org/gitlab-ce!20575

The `empty?` check was iterating over all Wiki pages to determine
whether it was empty. Using the limit parameter allows us to bail
out early once we found a page.

Note that this currently only improves performance for GitLab 11.0
until https://gitlab.com/gitlab-org/gitaly/issues/1204 is fixed.

Relates to #40101

Remove timeouts from TimeTracker tests

See merge request gitlab-org/gitlab-ce!20510

Resolve "Use Danger gem"

Closes #20700

See merge request gitlab-org/gitlab-ce!19066

Fix #48934 - Focus on text input on danger confirmation

Closes #48934

See merge request gitlab-org/gitlab-ce!20435

This reverts commit d493c91d.

closes #48690

Merge branch '49021-preserve-test-run-artifacts-when-running-gitlab-qa-multiple-times' into 'master'

Resolve "Preserve test run artifacts when running gitlab-qa multiple times"

Closes #49021

See merge request gitlab-org/gitlab-ce!20495

Truncate filenames created by bin/changelog to 140 characters

See merge request gitlab-org/gitlab-ce!20556

Fix MR widget border

See merge request gitlab-org/gitlab-ce!20562