Merge branch '6224-extract-ee-specific-files-lines-for-app-views-shared-boards-components' into 'master'

Resolve "Extract EE specific files/lines for app/views/shared/boards/components"

Closes gitlab-ee#6224

See merge request gitlab-org/gitlab-ce!20292

Update left side nav border UI

Closes #46222

See merge request gitlab-org/gitlab-ce!19967

Add title placeholder for new issues

Closes #48085

See merge request gitlab-org/gitlab-ce!20271

Fixed last commit author link is blue regression

Closes #48251

See merge request gitlab-org/gitlab-ce!20234

Change path to CI job traces

Closes #47173

See merge request gitlab-org/gitlab-ce!19422

Update index.md changed "gonna" to "going to be"

See merge request gitlab-org/gitlab-ce!20310

Add detail around 'Build Key' within the GitLab steps.

See merge request gitlab-org/gitlab-ce!20219

Update external link icon in merge request widget

See merge request gitlab-org/gitlab-ce!20154

Prep work to support git/git-lfs redirect to primary

See merge request gitlab-org/gitlab-ce!19728

CE Backport: Add support for autocompleting Epics within Issues & MRs and Labels within Epics

See merge request gitlab-org/gitlab-ce!20238

Fix notify_conflict? raising exception due to absent branches

Closes #48653

See merge request gitlab-org/gitlab-ce!20280

Add note for variable usage in singular

See merge request gitlab-org/gitlab-ce!20286

Remove outdated comment from emoji_filter.rb

See merge request gitlab-org/gitlab-ce!20306

repository.can_be_merged? can raise error if diff_head_sha or
target_branch are absent, therefore check those explicitly.

Improve performance of User.without_projects scope

Closes #48577

See merge request gitlab-org/gitlab-ce!20264

Update installation and update guides for 11.1

See merge request gitlab-org/gitlab-ce!20299

Resolve "Milestone page list redesign"

Closes #39543

See merge request gitlab-org/gitlab-ce!19832

Merge branch '42677-cancel-automatic-merge-button-gets-a-bigger-height-than-it-should-when-content-overflows' into 'master'

Resolve "Cancel automatic merge button gets a bigger height than it should when content overflows"

Closes #42677

See merge request gitlab-org/gitlab-ce!20193

Update digital ocean s3 docs

Closes #42510

See merge request gitlab-org/gitlab-ce!20198

Add border to "other" label items

See merge request gitlab-org/gitlab-ce!20250

Resolve "Import with Milestones Failing"

Closes #43270 and #47626

See merge request gitlab-org/gitlab-ce!19961

Use root ref instead of HEAD to find latest repository commit

Closes gitlab-ee#5864

See merge request gitlab-org/gitlab-ce!20258

Improve documentation of how to build Docker Images with GitLab CI

See merge request gitlab-org/gitlab-ce!20254

Add aws_signature_version to object storage docs

Closes #48622

See merge request gitlab-org/gitlab-ce!20257

Cancel ExclusiveLease upon completion in ProjectCacheWorker

Closes #44726

See merge request gitlab-org/gitlab-ce!20103

Resolve "404 when trying to create a new issue from the group"

Closes #47462

See merge request gitlab-org/gitlab-ce!19869

Expire correct method caches after HEAD changed

Closes #44725

See merge request gitlab-org/gitlab-ce!20102

Replaces date.format.js in vendor with NPM package

See merge request gitlab-org/gitlab-ce!20195