Rework ES permissions check

See merge request !507

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Merge remote-tracking branch 'origin/all-ci-offline-migrations'

See merge request !1451

Get Geo secondaries nodes statuses over AJAX

See merge request !1438

Removes issue milestone when removing from board with milestone

Closes gitlab-ce#29613

See merge request !1446

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/29613

Load balancing of database queries

See merge request !1283

Strip out `nil`s in the Array of Commit objects returned from `find_commits_by_message_with_elastic`

Closes #835

See merge request !1430

Port of issue boards filter bar in modal window to EE

See merge request !1435

Expose GitLab QA failure screenshots for EE hooks

See merge request !1440

Strip out `nil`s in the Array of Commit objects returned from `find_commits_by_message_with_elastic`

This commit also removes an N-query issue with the Project lookups on the class-level version of this method

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

See merge request !1441

Add docs to CSV export

See merge request !1389

20450 fix ujs actions ee

See merge request !1370