Fixed Filters not persisting correctly in Wireless Grid and Wireless Crafting Monitor

src/main/java/com/raoulvdberge/refinedstorage/container/ContainerGrid.java

@@ -173,6 +173,11 @@ public class ContainerGrid extends ContainerBase {
 
                             detectAndSendChanges();
 
+                            // For some reason it doesn't detect when moving the filter from filter inventory to player inventory...
+                            if (slotIndex < 4) {
+                                grid.getFilter().setStackInSlot(slotIndex, ItemStack.EMPTY);
+                            }
+
                             return ItemStack.EMPTY;
                         }
                     } else if ((grid.getType() == GridType.PATTERN && stack.getItem() == RSItems.PATTERN) || (grid instanceof IPortableGrid && stack.getItem() instanceof IStorageDiskProvider)) {