CultureLevelInfo xml isn't parsed properly

[dzfischer]

getCultureLevelInfo and getNumCultureLevelInfos count all culture levels from the xml, not caring whether the realistic culture gameoption is on or not. As a result, there are multiple places in the dll that check this inconsistently. For example
Going from "Developing" to "Refined" in a standard game (skipping over Prominent) causes borders to grow twice, because level has grown by 2. Similar effects are likely all over.

Example workaround for updateCultureLevel:
Bad fix on realistic-culture-tweaks branch, will need removal if done properly!

A proper fix should probably involve fixing the two base functions to appropriately count levels and get info, only for levels that are applicable due to game options. Flabbert has said:
"this is the time you create a new class that holds the culture calculations, create a new calculator there, and call that everywhere
you can even make it static"

Sadly, I have concluded I don't understand well enough to do myself 😓

[dzfischer]

Hm, didn't mean to make this autoclose.
Last commit to #1400 had a workaround, but base issue is still present and causing issues I'm sure.