disable iso selection field

app/UI/VmCreate/Fields/OsTemplateSelect.php

@@ -85,7 +85,7 @@ class OsTemplateSelect extends Select implements ClientArea
             {
                 continue;
             }
-            if ($this->configuration()->isPermissionOsTemplates() && !in_array($entity->getName(), $this->configuration()->getPermissionOsTemplates()))
+            if (!$entity->isCustom() && $this->configuration()->isPermissionOsTemplates() && !in_array($entity->getName(), $this->configuration()->getPermissionOsTemplates()))
             {
                 continue;
             }