Recent search history for issues -- EE merge edition

Closes gitlab-ce#27262

See merge request !1547

Linking to edit file directly -- EE merge edition

See merge request !1546

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/27262

Conflicts:
	app/assets/javascripts/filtered_search/filtered_search_manager.js
	app/views/shared/issuable/_search_bar.html.haml

CE Upstream - Wednesday

Closes gitlab-ci-multi-runner#2284

See merge request !1577

Add merge request discrepancy resolutions to documentation

See merge request !1532

Signed-off-by: Rémy Coutable <remy@rymai.me>

Rename Rake task from geo:add_primary_node to geo:set_primary_node

See merge request !1579

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