Dehardcode max number of campaign levels
The Ancestral Tales mod was originally split into two campaigns because it has 60 levels, and apparently campaigns are limited to 50 levels: https://gitlab.com/osslugaru/nonfree-mods/tree/master/AncestralTales
Looking at https://gitlab.com/osslugaru/lugaru/blob/master/Source/User/Account.hpp#L142 it seems that this limitation is still there, we should probably lift it and instead read the array size from the campaign file.