Add back hopper tick scheduling

Tick a hopper only if certain conditions have changed i.e. inventory changes, redstone updates, etc.

CraftBukkit-Patches/0008-Merge-tweaks-and-configuration.patch

@@ -73,8 +73,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/org/spigotmc/SpigotWorldConfig.java
 +++ b/src/main/java/org/spigotmc/SpigotWorldConfig.java
 @@ -0,0 +0,0 @@ public class SpigotWorldConfig
-         saplingModifier = getAndValidateGrowth( "Sapling" );
          wheatModifier = getAndValidateGrowth( "Wheat" );
+         wartModifier = getAndValidateGrowth( "NetherWart" );
      }
 +
 +    public double itemMerge;