[Savestates] Fix bossbars not being cleared on loadstate (#254)

Cleared all boss bars on savestate load on the client. They will be
readded automatically when a boss appears

Fixes #219

Author: ScribbleTAS

src/main/java/com/minecrafttas/tasmod/savestates/SavestateHandlerClient.java

@@ -330,6 +330,9 @@ public static void loadPlayer(NBTTagCompound compound) {
 		SubtickDuck entityRenderer = (SubtickDuck) Minecraft.getMinecraft().entityRenderer;
 		entityRenderer.runUpdate(0);
 
+		// Clear boss bars on savestate load
+		mc.ingameGUI.getBossOverlay().clearBossInfos();
+
 		EventListenerRegistry.fireEvent(EventSavestate.EventClientLoadPlayer.class, player);
 	}