Priority GUI improvements (#3592)

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

@@ -491,4 +491,16 @@ public class PartFluidStorageBus extends PartSharedStorageBus implements IMEMoni
 			return MODELS_OFF;
 		}
 	}
+	
+	@Override
+	public ItemStack getItemStackRepresentation()
+	{
+		return AEApi.instance().definitions().parts().fluidStorageBus().maybeStack( 1 ).orElse( ItemStack.EMPTY );
+	}
+
+	@Override
+	public GuiBridge getGuiBridge()
+	{
+		return GuiBridge.GUI_STORAGEBUS_FLUID;
+	}
 }