Added stacking of goods, meaning that only what's already in the receivers cargobay gets transferred.
To do this, hold the Right Mouse Button down while clicking the "Transfer All" button.

Why this obscure way of doing it?
Because I can't be bothered to copy over the whole UI creation function to make minor changes, just because the references to the UI containers get thrown away while UIElements do not offer function to retrieve their container.

Fixed a bug that confused same goods of different states (stolen etc)

Fixed a bug with the max amount on entering was not the right one
Transfering a single good will transfer as much as possible if the full amount is not possible