1.15.2 update (#2887)

Functional GUI fix added by billygalbreath

Spigot-Server-Patches/Support-Overriding-World-Seeds.patch

@@ -15,7 +15,7 @@ This seed will end up being saved to the world data file, so it is
 a permanent change in that it won't go back if you remove it from paper.yml
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
-index 214b577b32..559e6b42ba 100644
+index 214b577b3..559e6b42b 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
 @@ -0,0 +0,0 @@ import java.lang.reflect.Modifier;
@@ -59,7 +59,7 @@ index 214b577b32..559e6b42ba 100644
 +    }
  }
 diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
-index dd2d8712ed..7fd0404093 100644
+index 9e5fe9794..52ec526fc 100644
 --- a/src/main/java/net/minecraft/server/MinecraftServer.java
 +++ b/src/main/java/net/minecraft/server/MinecraftServer.java
 @@ -0,0 +0,0 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
@@ -72,7 +72,7 @@ index dd2d8712ed..7fd0404093 100644
  
              if (j == 0) {
 diff --git a/src/main/java/net/minecraft/server/WorldData.java b/src/main/java/net/minecraft/server/WorldData.java
-index 2d4691b7b5..4e35846a3f 100644
+index 561b6d946..95518e54d 100644
 --- a/src/main/java/net/minecraft/server/WorldData.java
 +++ b/src/main/java/net/minecraft/server/WorldData.java
 @@ -0,0 +0,0 @@ public class WorldData {
@@ -85,7 +85,7 @@ index 2d4691b7b5..4e35846a3f 100644
              String s = nbttagcompound.getString("generatorName");
  
 diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
-index 8636283fd1..1ca9a7724a 100644
+index 39934233d..b02995144 100644
 --- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
 +++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
 @@ -0,0 +0,0 @@ public final class CraftServer implements Server {