more fixes

- grid / crafting grid differ works
- cable / sensitive cable differ works
- redstoen mode works again

src/main/java/storagecraft/tile/TileBase.java

@@ -84,7 +84,7 @@ public abstract class TileBase extends TileEntity implements IUpdatePlayerListBo
 	@Override
 	public boolean shouldRefresh(World world, BlockPos pos, IBlockState oldState, IBlockState newState)
 	{
-		return false;
+		return oldState.getBlock() != newState.getBlock();
 	}
 
 	public IInventory getDroppedInventory()