menu: unpack the remaining DNS Tools into Services

src/opnsense/mvc/app/models/OPNsense/Base/Menu/Menu.xml

@@ -231,7 +231,7 @@
                 <Details url="/status_dhcpv6_leases.php?*" visibility="hidden"/>
             </Leases>
         </DHCPv6>
-        <OpenDNS VisibleName="OpenDNS" url="/services_opendns.php"/>
+        <OpenDNS VisibleName="OpenDNS" url="/services_opendns.php" cssClass="fa fa-tags fa-fw"/>
         <Diagnostics order="900" cssClass="fa fa-medkit fa-fw" url="/status_services.php">
           <All url="/status_services.php?*" visibility="hidden"/>
         </Diagnostics>

src/opnsense/mvc/app/models/OPNsense/DynamicDNS/Menu/Menu.xml

 <menu>
     <Services>
-        <DNSTools>
-            <DynamicDNS VisibleName="Dynamic DNS" url="/services_dyndns.php">
+        <DynamicDNS VisibleName="Dynamic DNS" url="/services_dyndns.php" cssClass="fa fa-tags fa-fw">
             <Edit url="/services_dyndns_edit.php*" visibility="hidden"/>
         </DynamicDNS>
-        </DNSTools>
     </Services>
 </menu>

src/opnsense/mvc/app/models/OPNsense/RFC2136/Menu/Menu.xml

 <menu>
     <Services>
-        <DNSTools>
-            <RFC2136 VisibleName="RFC 2136" url="/services_rfc2136.php">
+        <RFC2136 VisibleName="RFC 2136" url="/services_rfc2136.php" cssClass="fa fa-tags fa-fw">
             <Edit url="/services_rfc2136_edit.php*" visibility="hidden"/>
         </RFC2136>
-        </DNSTools>
     </Services>
 </menu>