network: ipv4 can be disabled

dashboard/src/views/network.html

@@ -171,7 +171,7 @@
       </div>
     </div>
 
-    <div class="row">
+    <div class="row" ng-show="sysinfo.provider !== 'noop'">
       <div class="col-xs-6">
         <span class="text-muted">{{ 'network.ip.address' | tr }}</span>
       </div>

dashboard/src/views/network.js

@@ -11,6 +11,7 @@ angular.module('Application').controller('NetworkController', ['$scope', '$locat
 
     // keep in sync with sysinfo.js
     $scope.sysinfoProvider = [
+        { name: 'Disabled', value: 'noop' },
         { name: 'Public IP', value: 'generic' },
         { name: 'Static IP Address', value: 'fixed' },
         { name: 'Network Interface', value: 'network-interface' }