Se agrega css para dhcp options

src/HostBundle/Resources/views/CRUD/dhcp_options.html.twig

@@ -0,0 +1,11 @@
+{% extends 'SonataAdminBundle:CRUD:base_list_field.html.twig' %}
+
+{% block field %}
+
+<pre >
+    <code>
+        {{ value }}
+    </code>
+</pre>
+
+{% endblock %}

src/IPv4Bundle/Admin/SubNetAdmin.php

@@ -31,7 +31,10 @@ class SubNetAdmin extends BaseAdmin
     {
         $listMapper
             ->add('address')
-            ->add('options')
+            ->add('options', null, [
+                'header_style' => 'width: 50%',
+                'template' => 'HostBundle:CRUD:dhcp_options.html.twig',
+            ])
             ->add('allowedHostType')
             ->add('status')
             ->add('netGroup')

src/IPv6Bundle/Admin/SubNetAdmin.php

@@ -31,7 +31,10 @@ class SubNetAdmin extends BaseAdmin
     {
         $listMapper
             ->add('address')
-            ->add('options')
+            ->add('options', null, [
+                'header_style' => 'width: 50%',
+                'template' => 'HostBundle:CRUD:dhcp_options.html.twig',
+            ])
             ->add('allowedHostType')
             ->add('status')
             ->add('netGroup')