Adds ExportCsvWorker spec

See merge request !1433

Moved the gear settings dropdown in the group view to a tab

See merge request !1409

prevent filtering Issues by multiple milestones, authors, or assignees

See merge request !1410

Remove pushes count from usage ping payload

Closes #1858

See merge request !1432

This query is constantly generating timeout errors on large installations and we don't
have a simple solution for now and also we don't think having this counter is
really critical.

For all timetracking props, include annotations

Closes #1428

See merge request !1405

Add a note about ES update to the GitLab update guide

Closes #1585

See merge request !1428

to the first option inside said subtab.

Also code cleanup

This reverts merge request !1426

Port of 27376-cache-default-branch-pipeline-on-project to EE

See merge request !1426

Fix rake gitlab:env:info elasticsearch datum

Closes #1164

See merge request !1422

Port of issue-boards-new-search-bar to EE

See merge request !1397

Updated issue boards

See merge request !1419

[ci skip]

Fix rollback for an EE migration

See merge request !1425

Move the index removal to be before the column removal

* Audit Events
* Pipeline quotas
* Analytics

Resolve "Use the v4 API from the frontend"

Closes #1849

See merge request !1373

[EE] Remove explicit `require` calls, and use `require_dependency` when needed

See merge request !1413

The update includes the change to multiple issue boards that can have a milestone