UI test build
Fixes #3147 Add rel="noreferrer" to all outgoing links . This works in Firefox so far and only for "left clicks". Not perfect, but hopefully other browsers will implement this in the future, as it's a useful privacy enhancing feature!
ui screenshots build
Fixing Contents system tests.
Fixing build
Fix typos which should fix screenshot build
Fix UI tests regression for all websites dashboard.
Merge branch 'master' into processed_metrics_metadata

Conflicts:
	plugins/Actions/Reports/GetSiteSearchKeywords.php
	tests/PHPUnit/System/expected/test_ArchiveCronTest_archive_php_cron_output.txt