better format for backup switch

app/UI/VmCreate/Sections/AdditionalDiskSection.php

@@ -37,6 +37,13 @@ class AdditionalDiskSection extends BaseSection implements ClientArea
         $field->setDescription('description');
         $field->replaceClasses(['lu-col-md-6']);
         $this->addField($field);
+        //backup
+        if ($this->configuration()->isPermissionAdditionalDiskBackup())
+        {
+            $field = new Switcher('additionalDiskBackup');
+            $field->replaceClasses(['lu-form-check lu-m-b-2x']);
+            $this->addField($field);
+        }
         //bus
         $field = new Select('additionalDiskBus');
         $options=[];
@@ -68,12 +75,5 @@ class AdditionalDiskSection extends BaseSection implements ClientArea
             $field->replaceClasses(['lu-col-md-6']);
             $this->addField($field);
         }
-        //backup
-        if ($this->configuration()->isPermissionAdditionalDiskBackup())
-        {
-            $field = new Switcher('additionalDiskBackup');
-            $field->replaceClasses(['lu-col-md-6']);
-            $this->addField($field);
-        }
     }
 }