[pve-devel] Change isci provider field from text input to drop-down list

[mir at datanom.net]

Disregard last patch.

Patches fix indentation and change text field for iscsi provider input
to use a combobox instead since user in its present state would need to
know in advance the available iscsi providers which proxmox supports.
Instead show the available providers for the user in a drop-down box.