1.15.2 update (#2887)

Functional GUI fix added by billygalbreath

Spigot-API-Patches/Improve-the-Saddle-API-for-Horses.patch

@@ -8,7 +8,7 @@ and access their saddle state separately from an interface shared with Armor.
 
 diff --git a/src/main/java/org/bukkit/inventory/ArmoredHorseInventory.java b/src/main/java/org/bukkit/inventory/ArmoredHorseInventory.java
 new file mode 100644
-index 000000000..163ffe8ff
+index 00000000..163ffe8f
 --- /dev/null
 +++ b/src/main/java/org/bukkit/inventory/ArmoredHorseInventory.java
 @@ -0,0 +0,0 @@
@@ -34,7 +34,7 @@ index 000000000..163ffe8ff
 +    void setArmor(@Nullable ItemStack stack);
 +}
 diff --git a/src/main/java/org/bukkit/inventory/HorseInventory.java b/src/main/java/org/bukkit/inventory/HorseInventory.java
-index 608e99c42..53498debe 100644
+index 608e99c4..53498deb 100644
 --- a/src/main/java/org/bukkit/inventory/HorseInventory.java
 +++ b/src/main/java/org/bukkit/inventory/HorseInventory.java
 @@ -0,0 +0,0 @@ import org.jetbrains.annotations.Nullable;
@@ -60,7 +60,7 @@ index 608e99c42..53498debe 100644
 -}
 +public interface HorseInventory extends AbstractHorseInventory, ArmoredHorseInventory {}
 diff --git a/src/main/java/org/bukkit/inventory/LlamaInventory.java b/src/main/java/org/bukkit/inventory/LlamaInventory.java
-index 2fa2c9d07..5ac1afb8a 100644
+index 2fa2c9d0..5ac1afb8 100644
 --- a/src/main/java/org/bukkit/inventory/LlamaInventory.java
 +++ b/src/main/java/org/bukkit/inventory/LlamaInventory.java
 @@ -0,0 +0,0 @@ import org.jetbrains.annotations.Nullable;
@@ -74,7 +74,7 @@ index 2fa2c9d07..5ac1afb8a 100644
       * Gets the item in the llama's decor slot.
 diff --git a/src/main/java/org/bukkit/inventory/SaddledHorseInventory.java b/src/main/java/org/bukkit/inventory/SaddledHorseInventory.java
 new file mode 100644
-index 000000000..7944f26a3
+index 00000000..7944f26a
 --- /dev/null
 +++ b/src/main/java/org/bukkit/inventory/SaddledHorseInventory.java
 @@ -0,0 +0,0 @@