AI cannot unmortgage inherited properties

[AdvanceToBoardwalk]

When an AI player that has mortgaged properties loses to another AI player, the option to unmortgage is controlled by the human player (even when it’s not the human player’s turn) and not the AI who won them.

[intrepidcoder]

Yes, I remember there were a few actions that were not completely implemented in the AI logic, as it was experimental. At this point, I'm not really interested in finishing the AI support, but I'll leave this issue open for reference.