[NEW!] Allowances: Restrict Moving Overage Charge To Another Reservation

Previously, when overage charges were transferred from a checked-in reservation to a reservation that had not yet checked in, the system incorrectly posted those charges to the ALLOWANCES tab instead of the Guest Bill. With this update, overage charges can no longer be transferred from one reservation to another, aligning with expected billing behavior. This prevents overages from appearing incorrectly in the ALLOWANCES tab and ensures accurate billing records. This change ensures overage transactions remain tied to the original reservation where they were incurred, providing greater accuracy and consistency in guest billing and accounting.