try to reenable vmcreate after delete action

app/UI/VirtualNetwork/Pages/VirtualNetworkDataTable.php

@@ -50,7 +50,7 @@ class VirtualNetworkDataTable extends DataTable implements ClientArea
         $createButton->addClass("pmCreateVirtualNetworkButton");
         if (!$resourceManager->virtualNetworks()->hasFreeTotal())
         {
-            $createButton->addClass("hidden");
+            $createButton->addClass("disabled");
         }
         //Create
         $this->addButton($createButton);