Atlases cannot be combined properly.

Fun fact, there is a commit from tyra314 that solves this: https://github.com/tyra314/AntiqueAtlas/commit/d0dfc6562b5ba42bfed80e2e8b3e845435b334d0

I feel like it was supposed to be merged. I'll just recreate the differences I guess. There aren't very many

I've merged this commit to 1.11.2 branch. Isn't?
Or you about 1.8 - 1.9 branches?

Huh, now that I look again, the changes are there. I guess I just wasn't able to find the commit hash.

I was trying to fix this on the 1.9.4 branch, and was hoping to cherry pick that commit, but it didn't work.

Also see this commit 47e68ef

Okay, this does seem to make the composite map stick around. Now i just need to make them combine their data correctly.