Allows to modify certain reservation properties

Here is the list of operations that are currently allowed:

• Add, replace and remove Comment
• Add, replace and remove GuestComment
• Add, replace and remove PaymentAccount
• Add, replace and remove RegisteredCard
• Add, replace and remove TravelPurpose
• Add, replace and remove AdditionalGuests
• Add a company (using company/Id, and only if not already set)
• Add, replace and remove Commission
• Replace PrimaryGuest
• Remove ValidationMessages
• Add, replace and remove MarketSegment
• Replace IsOpenForCharges
• Replace IsPreCheckedIn<br>You must have this scope: 'reservations.manage'.