Reverts some of the changes to ItemList.

Removes the split collection as in some rare corner cases the insertion
order is important to maintain the correct data in terms of self cleaning.

Keeps the general cleanups and split of Fluid/ItemList.

Fixes #1964

src/main/java/appeng/me/storage/CellInventory.java

@@ -29,6 +29,7 @@ import net.minecraft.nbt.NBTBase;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraftforge.oredict.OreDictionary;
 
+import appeng.api.AEApi;
 import appeng.api.config.Actionable;
 import appeng.api.config.FuzzyMode;
 import appeng.api.exceptions.AppEngException;
@@ -43,7 +44,6 @@ import appeng.api.storage.data.IAEItemStack;
 import appeng.api.storage.data.IItemList;
 import appeng.util.Platform;
 import appeng.util.item.AEItemStack;
-import appeng.util.item.UnsortedItemList;
 
 
 public class CellInventory implements ICellInventory
@@ -191,7 +191,7 @@ public class CellInventory implements ICellInventory
 
 	private boolean isEmpty( final IMEInventory<IAEItemStack> meInventory )
 	{
-		return meInventory.getAvailableItems( new UnsortedItemList() ).isEmpty();
+		return meInventory.getAvailableItems( AEApi.instance().storage().createItemList() ).isEmpty();
 	}
 
 	@Override
@@ -446,7 +446,7 @@ public class CellInventory implements ICellInventory
 	{
 		if( this.cellItems == null )
 		{
-			this.cellItems = new UnsortedItemList();
+			this.cellItems = AEApi.instance().storage().createItemList();
 		}
 
 		this.cellItems.resetStatus(); // clears totals and stuff.