Fixes in the listview plugin_listviewfirst version of the dns module.

interface/lib/classes/plugin_listview.inc.php

interface/lib/classes/tform_actions.inc.php

interface/web/dns/dns_a_edit.php

interface/web/dns/dns_a_list.php

interface/web/dns/dns_alias_edit.php

interface/web/dns/dns_cname_edit.php

interface/web/dns/dns_hinfo_edit.php

interface/web/dns/dns_mx_edit.php

interface/web/dns/dns_ns_edit.php

interface/web/dns/dns_ptr_edit.php

interface/web/dns/dns_rp_edit.php

interface/web/dns/dns_rr_del.php

interface/web/dns/dns_soa_edit.php

interface/web/dns/dns_soa_list.php

interface/web/dns/dns_srv_edit.php

interface/web/dns/dns_txt_edit.php

interface/web/dns/form/dns_a.tform.php

interface/web/dns/form/dns_alias.tform.php

interface/web/dns/form/dns_cname.tform.php

interface/web/dns/form/dns_hinfo.tform.php