Undo use of >j17 features in source

Author: NotStirred

chunky/src/java/se/llbit/chunky/ui/controller/WorldChooserController.java

@@ -171,7 +171,7 @@ private void loadWorld(World.Info info, WorldMapLoader mapLoader) {
 
           if (loadTexturesConfirm.showAndWait().orElse(ButtonType.CANCEL) == ButtonType.YES) {
             // add world resource pack with highest priority
-            currentlyLoadedPacks.addFirst(worldResourcePack);
+            currentlyLoadedPacks.add(0, worldResourcePack);
             ResourcePackLoader.loadAndPersistResourcePacks(currentlyLoadedPacks);
           }
         }

chunky/src/java/se/llbit/chunky/world/java/JavaWorld.java

@@ -128,7 +128,7 @@ public Dimension loadDimension(Dimension.Identifier dimensionId) {
 
   @NotNull
   private static Dimension loadDimension(JavaWorld world, Path worldDirectory, Dimension.Identifier dimensionId, Set<PlayerEntityData> playerEntities, @Nullable Vector3i spawnPos) {
-    Path dimensionDirectory = worldDirectory.resolve("dimensions", dimensionId.namespace(), dimensionId.name());
+    Path dimensionDirectory = worldDirectory.resolve("dimensions").resolve(dimensionId.namespace()).resolve(dimensionId.name());
     if (Files.exists(dimensionDirectory)) {
       // 26.1-snapshot-6 or later
       return new JavaDimension(world, dimensionId, dimensionDirectory, playerEntities, spawnPos);