uses the MultiDiskPanel as base and implements the necessary
functions/variables
this allows now to create a vm also without any disk
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Tested-by: Lorenz Stechauner <l.stechauner@proxmox.com>
Tested-by: Aaron Lauterer <a.lauterer@proxmox.com>
