Setup Improved: Mementos for AI players 1.2

Adds a lot more civ-specific mementos, credit to @Renouf for a ton of work making all these combos! Also removes some placeholder combos of the basic attribute mementos in later eras.

Adds a toggle button, and adds support for changing Parameters like the AiMemento, or other ones like my mod to scale up difficulties.

Big thanks to @Renouf for putting together a number of memento combos for each leader to make things more interesting. I've added them in, and weighted the combos so they should show up about half the time as opposed to the dynamic ones.

Also some bugfixes where mementos weren't updated after a civ was kicked off a leader because another one had higher priority, and a bugfix so two personas dont show up in the same game by randomisation (you can still do it manually, ofc).

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