Merge branch 'Cambra/ispconfig3-favourite_servers'

install/sql/incremental/upd_dev_collection.sql

interface/lib/classes/client_templates.inc.php

interface/web/admin/form/system_config.tform.php

interface/web/admin/lib/lang/en.lng

interface/web/admin/lib/lang/en_system_config.lng

interface/web/admin/lib/lang/es.lng

interface/web/admin/lib/lang/es_system_config.lng

interface/web/admin/list/server.list.php

interface/web/admin/system_config_edit.php

interface/web/admin/templates/system_config_mail_edit.htm

interface/web/admin/templates/system_config_sites_edit.htm

interface/web/client/client_edit.php

interface/web/client/client_template_edit.php

interface/web/client/form/client_template.tform.php

interface/web/client/lib/lang/en_client_template.lng

interface/web/client/lib/lang/es_client_template.lng

...face/web/client/templates/client_template_edit_limits.htm

interface/web/dns/dns_import.php

interface/web/dns/dns_slave_edit.php

interface/web/dns/dns_soa_edit.php