fix: models with multiple parts not being normalized properly (#1825)

Tested that models are migrated to the new format a-ok
Tested that the new logic works as expected.
Old code needs to be kept so that models in both states can be brought to modern standards

dCommon/CMakeLists.txt

@@ -20,6 +20,7 @@ set(DCOMMON_SOURCES
 		"TinyXmlUtils.cpp"
 		"Sd0.cpp"
 		"Lxfml.cpp"
+		"LxfmlBugged.cpp"
 )
 
 # Workaround for compiler bug where the optimized code could result in a memcpy of 0 bytes, even though that isnt possible.