I remember in Rome there is a button on the family tree. However, I can't find it this time around. My current faction heir was on his way to glory. However, he has fallen off due to idleness in the city. There's this young general with high command, loyalty, piety and chivalry who won 2 heroic victories and led a successful Crusade and is still out there conquering. I want to make the latter the faction heir. How do I do that?