Changes the way savefile version upgrades are done, letting each sub-setting handle it own upgrade path, while also making it easier to transfer settings between preferences and individual characters save slots.
Adds client verb to access the character setup screen from anywhere.
Moves name validation to species level, making it possible for IPCs to have numbers in their name.
Adds gender validation, also adds support to add neuter/plural genders in the future if ever desired.
Now sanitizes preferences before applying them to a mob.
Fixes#11433.
