VMEdit: investigate removal of potentially uselss parameters

Here is the VMEdit structure as defined in common/params/vms.go:

type VMEdit struct {
	Name string           `json:"name"       validate:"required,min=4,max=256"`
	Cpus int              `json:"cpus"       validate:"required,gte=1,lte=16"`
	Ram int               `json:"ram"        validate:"required,gte=256,lte=32768"`
	Nic vm.NicType        `json:"nic"        validate:"required`
	UsbDevs []string      `json:"usbDevs"    validate:"required`
	CpusUpdated bool
	RamUpdated bool
}

The CpusUpdated and RamUpdated parameters can probably be removed. It would be cleaner to do so on both client and server side. Investigate if this is doable.