Small fix to make sure that the AI only uses heritage when the child has the wrong culture. It should use faith if only religion does not match the liege's.

Last minute change to be in line with the changelog.

Childhood focus:

Ignoring the influence of traits, 60% of the time the AI will give its government's favourite focus (40% and 20% when two focus) and 40% of the time another random focus.
Heritage or faith is even more favoured in case of wrong culture or religion.
Furthermore, the AI has some logic to roleplay the childhood focus choice.

- Patrician more likely to give duty or pride focus
- Tribals more likely to give struggle or thrift focus
- Theocracies much more likely to give faith focus
- Nomads were coded to favour struggle in vanilla, this has been kept however the probability has been reduced to be in line with other government preferences
- Increased the likelihood to pick heritage if religion or culture are not the liege's, to make up for the other increases of weightings
- Faith may now be picked by the AI

Education focus:

- removed tribal AI weighting for martial education, many children will be drawn to this due to having be assigned struggle already
- added AI weight for every positive and negative weight, best option is not guaranteed but a lot more common
- slow lieges are less likely to make a good choice and imbecile lieges will make a random choice