Fix dupes with FilterSlots (#2567)

src/main/java/com/refinedmods/refinedstorage/container/slot/filter/FilterSlot.java

@@ -1,6 +1,7 @@
 package com.refinedmods.refinedstorage.container.slot.filter;
 
 import com.refinedmods.refinedstorage.container.slot.BaseSlot;
+import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.BlockItem;
 import net.minecraft.item.ItemStack;
 import net.minecraftforge.items.IItemHandler;
@@ -46,6 +47,11 @@ public class FilterSlot extends BaseSlot {
         super.putStack(stack);
     }
 
+    @Override
+    public boolean canTakeStack(PlayerEntity playerIn) {
+        return false;
+    }
+
     public boolean isSizeAllowed() {
         return (flags & FILTER_ALLOW_SIZE) == FILTER_ALLOW_SIZE;
     }

src/main/java/com/refinedmods/refinedstorage/container/slot/filter/FluidFilterSlot.java

@@ -3,6 +3,7 @@ package com.refinedmods.refinedstorage.container.slot.filter;
 import com.refinedmods.refinedstorage.container.slot.BaseSlot;
 import com.refinedmods.refinedstorage.inventory.fluid.FluidInventory;
 import com.refinedmods.refinedstorage.util.StackUtils;
+import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
 import net.minecraftforge.items.ItemStackHandler;
 
@@ -35,6 +36,11 @@ public class FluidFilterSlot extends BaseSlot {
         fluidInventory.setFluid(getSlotIndex(), StackUtils.getFluid(stack, true).getValue());
     }
 
+    @Override
+    public boolean canTakeStack(PlayerEntity playerIn) {
+        return false;
+    }
+
     public boolean isSizeAllowed() {
         return (flags & FILTER_ALLOW_SIZE) == FILTER_ALLOW_SIZE;
     }