Group reservations edit dates logic

Per original functionality in CICO-17973, for a group reservation, regardless of release date: 

-When stay is shortened on group rooming list popup, reduce group grid by blocked count -1 and picked up count -1 for the dates the reservation has been shortened.

We are requesting (CICO-86933) that the logic follows how we handle CANCELLED group reservations. This logic states that;

if we are BEFORE the release date on the group summary, then reduce the picked up count but the room nights remain BLOCKED - the inventory remains assigned to the group. 

or

if we are AFTER the release date on the group summary, then reduce the picked up AND blocked count - essentially returning the inventory to the house.