Rebuild itemlist only once per tick

re-enabled level-emitters update

src/main/java/appeng/fluids/parts/PartFluidLevelEmitter.java

@@ -173,6 +173,7 @@ public class PartFluidLevelEmitter extends PartUpgradeable implements IStackWatc
 	@Override
 	public void postChange( final IBaseMonitor<IAEFluidStack> monitor, final Iterable<IAEFluidStack> change, final IActionSource actionSource )
 	{
+		this.updateReportingValue( (IMEMonitor<IAEFluidStack>) monitor );
 	}
 
 	@Override

src/main/java/appeng/me/cache/NetworkMonitor.java

@@ -64,6 +64,7 @@ public class NetworkMonitor<T extends IAEStack<T>> implements IMEMonitor<T>
 	private boolean hasChanged = false;
 	@Nonnegative
 	private int localDepthSemaphore = 0;
+	private boolean ticked;
 
 	public NetworkMonitor( final GridStorageCache cache, final IStorageChannel<T> chan )
 	{
@@ -139,9 +140,10 @@ public class NetworkMonitor<T extends IAEStack<T>> implements IMEMonitor<T>
 	@Override
 	public IItemList<T> getStorageList()
 	{
-		if( this.hasChanged )
+		if( hasChanged && ticked  )
 		{
-			this.hasChanged = false;
+			hasChanged = false;
+			ticked = false;
 			this.cachedList.resetStatus();
 			return this.getAvailableItems( this.cachedList );
 		}
@@ -326,6 +328,7 @@ public class NetworkMonitor<T extends IAEStack<T>> implements IMEMonitor<T>
 
 	void onTick()
 	{
+		ticked = true;
 		if( this.sendEvent )
 		{
 			this.sendEvent = false;

src/main/java/appeng/parts/automation/PartLevelEmitter.java

@@ -400,6 +400,7 @@ public class PartLevelEmitter extends PartUpgradeable implements IEnergyWatcherH
 	@Override
 	public void postChange( final IBaseMonitor<IAEItemStack> monitor, final Iterable<IAEItemStack> change, final IActionSource actionSource )
 	{
+		this.updateReportingValue( (IMEMonitor<IAEItemStack>) monitor );
 	}
 
 	@Override