fix: copy extra data from player team when creating a party team

Author: desht

common/src/main/java/dev/ftb/mods/ftbteams/data/AbstractTeam.java

@@ -275,4 +275,8 @@ void saveIfNeeded(Path directory, HolderLookup.Provider provider) {
 			shouldSave = false;
 		}
 	}
+
+	void copyExtraData(Team from) {
+		extraData = from.getExtraData().copy();
+	}
 }

common/src/main/java/dev/ftb/mods/ftbteams/data/TeamManagerImpl.java

@@ -414,6 +414,7 @@ public Pair<Integer, PartyTeam> createParty(UUID playerId, @Nullable ServerPlaye
 		PartyTeam team = createPartyTeamInternal(playerId, player, name);
 		if (description != null) team.setProperty(TeamProperties.DESCRIPTION, description);
 		if (color != null) team.setProperty(TeamProperties.COLOR, color);
+		team.copyExtraData(playerTeam);
 
 		playerTeam.setEffectiveTeam(team);