Reference: bnc#885094
grub.xen is required to boot Xen PV VMs using BTRFS. It belongs to
the grub2-x86_64-xen RPM and should never be deleted.
Index: virt-manager-3.0.0/virtManager/delete.py
===================================================================
--- virt-manager-3.0.0.orig/virtManager/delete.py
+++ virt-manager-3.0.0/virtManager/delete.py
@@ -458,7 +458,7 @@ def _populate_storage_list(storage_list,
model.clear()
for diskdata in diskdatas:
- if not diskdata.path:
+ if not diskdata.path or diskdata.path == "/usr/lib/grub2/x86_64-xen/grub.xen":
continue
# There are a few pieces here