ref #7587 New design for the site manager table and forms

plugins/SitesManager/SitesManager.php

plugins/SitesManager/lang/en.json

plugins/SitesManager/stylesheets/SitesManager.less

plugins/SitesManager/templates/global-settings.html

plugins/SitesManager/templates/help/excluded-ip-help.html

...anager/templates/help/excluded-query-parameters-help.html

...itesManager/templates/help/excluded-user-agents-help.html

plugins/SitesManager/templates/help/timezone-help.html

plugins/SitesManager/templates/sites-list/add-site-link.html

...s/SitesManager/templates/sites-list/alias-urls-field.html

plugins/SitesManager/templates/sites-list/site-fields.html

.../SitesManager/templates/sites-list/site-search-field.html

plugins/SitesManager/templates/sites-list/sites-list.html