Changes

Summary

1. Fix meta not being considered for book structures (details)

Commit c6c923dcdee7384fd65794b4d2b6076bcf054451 by bernhard.bonigl Fix meta not being considered for book structures
	src/main/java/slimeknights/mantle/client/gui/book/element/ElementStructure.java (diff)
	src/main/resources/assets/mantle/books/TestBook/structures/stonesmeltery.json (diff)