Allow repairing wioth multiple items

- Allow repairing AEs using more than 1 repair item at a time. Though it currently doesn't update the anvil GUI properly for whatever reason. However, when you take it out, it will have the correct durability.

src/main/java/nl/pim16aap2/armoredElytra/handlers/AnvilHandler.java

@@ -164,27 +164,24 @@ public class AnvilHandler extends ArmoredElytraHandler implements Listener
 
                 result = ArmoredElytra.getInstance().getNbtEditor()
                                       .addArmorNBTTags(result, newTier, plugin.getConfigLoader().unbreakable());
+
                 event.setResult(result);
+                return;
             }
         }
 
         // If one of the input items is null and the other an armored elytra, remove the result.
         // This prevent some naming issues.
-        // TODO: Allow renaming armored elytras.
         if ((itemA == null ^ itemB == null) &&
             ArmoredElytra.getInstance().getNbtEditor().getArmorTier(itemA == null ? itemB : itemA) != ArmorTier.NONE)
             event.setResult(null);
-        player.updateInventory();
     }
 
     // Let the player take items out of the anvil.
     @EventHandler
     public void onInventoryClick(InventoryClickEvent e)
     {
-        if (e.getRawSlot() != 2)
+        if (e.getRawSlot() != 2 || !(e.getWhoClicked() instanceof Player))
-            return;
-
-        if (!(e.getWhoClicked() instanceof Player))
             return;
 
         // Check if the event was a player who interacted with an anvil.

src/main/java/nl/pim16aap2/armoredElytra/handlers/ArmoredElytraHandler.java

@@ -44,7 +44,7 @@ abstract class ArmoredElytraHandler
             mult *= (100.0f / plugin.getConfigLoader().NETHERITE_TO_FULL());
 
         int maxDurability = Material.ELYTRA.getMaxDurability();
-        int newDurability = (int) (curDur - (maxDurability * mult));
+        int newDurability = (int) (curDur - repairItem.getAmount() * (maxDurability * mult));
         return (short) (Math.max(newDurability, 0));
     }