change test to slider for disk create

app/UI/Disk/Forms/UpdateForm.php

@@ -39,7 +39,11 @@ class UpdateForm extends BaseForm implements ClientArea
 
     public function initContent()
     {
-        parent::initContent();
+        $this->initIds('updateDiskForm');
+        $this->setFormType('update');
+        $this->setProvider(new DiskProvider());
+        $this->initFields();
+        $this->loadDataToForm();
 
         logModuleCall(
             'proxmoxCloud',
@@ -49,11 +53,6 @@ class UpdateForm extends BaseForm implements ClientArea
             parent::getFormData()['size']
         );
 
-        $this->initIds('updateDiskForm');
-        $this->setFormType('update');
-        $this->setProvider(new DiskProvider());
-        $this->initFields();
-        $this->loadDataToForm();
     }
 
     public function getAllowedActions()