bugfix max value in range slider

app/UI/Disk/Forms/UpdateForm.php

@@ -51,10 +51,10 @@ class UpdateForm extends BaseForm implements ClientArea
         $rangeField->setDefaultValue($diskSize);
         if ($this->configuration()->serverDiskSize->max > ($this->resourceManager->disk()->free() + $diskSize)) {
 //            $rangeField->setMaxValue($this->resourceManager->disk()->free() + $diskSize);
-            $rangeField->setMaxValue('200');
+            $rangeField->setMaxValue(200);
         } else {
 //            $rangeField->setMaxValue($this->configuration()->serverDiskSize->max);
-            $rangeField->setMaxValue('300');
+            $rangeField->setMaxValue(300);
         }
         $backupSwitcher = $this->getField('backup');
         if ( parent::getFormData()['id'] == 'scsi0') {