Merge branch 'master' of https://github.com/piwik/piwik into issue_9577

plugins/CoreHome/Menu.php

plugins/CoreHome/stylesheets/dataTable/_dataTable.less

plugins/CoreHome/stylesheets/layout.less

plugins/CoreHome/templates/_logo.twig

plugins/Dashboard/stylesheets/widget.less

plugins/ExamplePlugin/plugin.json

plugins/ExampleTheme/plugin.json

plugins/Live/stylesheets/live.less

plugins/Morpheus/stylesheets/theme-advanced.less

plugins/UsersManager/javascripts/usersManager.js

plugins/UsersManager/lang/en.json

tests/UI/specs/Dashboard_spec.js