UI for admins to assign ip pools to servers

app/views/servers/_form.html.haml

@@ -20,6 +20,7 @@
           e-mail will be routed normally to the intended recipients. When in <b>Development</b> mode,
           outgoing & incoming mail will be held and only visible in the web interface and will not be
           sent to any recipients or HTTP endpoints.
+
     .fieldSet__field
       = f.label :ip_pool_id, :class => 'fieldSet__label'
       .fieldSet__input

app/views/servers/admin.html.haml

@@ -30,9 +30,6 @@
         .fieldSet__field
           = f.label :raw_message_retention_size, :class => 'fieldSet__label'
           .fieldSet__input= f.text_field :raw_message_retention_size, :class => 'input input--text'
-        .fieldSet__field
-          = f.label :ip_pool_id, :class => 'fieldSet__label'
-          .fieldSet__input= f.collection_select :ip_pool_id, IPPool.order(:name), :id, :name, {}, :class => 'input input--select'
 
       .fieldSetSubmit.fieldSetSubmit--wide.buttonSet
         = f.submit "Save server", :class => 'button button--positive js-form-submit'