Change chunk loading method.

Behavior of loadChunk changed a lot for the worse in CB 1.14.

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java

@@ -305,9 +305,7 @@ public class BukkitWorld extends AbstractWorld {
     public void checkLoadedChunk(BlockVector3 pt) {
         World world = getWorld();
 
-        if (!world.isChunkLoaded(pt.getBlockX() >> 4, pt.getBlockZ() >> 4)) {
-            world.loadChunk(pt.getBlockX() >> 4, pt.getBlockZ() >> 4);
-        }
+        world.getChunkAt(pt.getBlockX() >> 4, pt.getBlockZ() >> 4);
     }
 
     @Override