refs #4877 lots of ui tweaks, fixes and general improvements

LEGALNOTICE

lang/en.json

plugins/Actions/javascripts/actionsDataTable.js

plugins/CoreAdminHome/templates/trackingCodeGenerator.twig

.../angularjs/enrichedheadline/enrichedheadline-directive.js

...CoreHome/angularjs/enrichedheadline/enrichedheadline.less

plugins/CoreHome/angularjs/enrichedheadline/help.png

plugins/CoreHome/javascripts/dataTable.js

plugins/Feedback/API.php

plugins/Feedback/Feedback.php

.../Feedback/angularjs/ratefeature/ratefeature-controller.js

plugins/Feedback/angularjs/ratefeature/ratefeature.html

plugins/Feedback/angularjs/ratefeature/ratefeature.less

plugins/Live/templates/indexVisitorLog.twig

plugins/SegmentEditor/templates/_segmentSelector.twig

plugins/SitesManager/templates/index.twig

plugins/UsersManager/templates/index.twig