rs-client: Cleanup (#1087)

* rs-client: name SpriteBuffer

* rs-client: (re)name spritebuffer methods

* rs-client/deob: Add missed @Export's, make updatemappings fix this next time

* rs-client: run intellij redundant else inspection

* rs-client: invert some script interpreter if's

* deob: checkstyle fixes

* rs-client: SpriteBuffer_loadSprite -> SpriteBuffer_bufferFile

runelite-mixins/src/main/java/net/runelite/mixins/SpriteMixin.java

@@ -35,13 +35,13 @@ public abstract class SpriteMixin implements RSClient
 		return widgetSpriteOverrides;
 	}
 
-	@Copy("loadSprite")
+	@Copy("SpriteBuffer_getSprite")
 	public static RSSprite rs$loadSprite(RSAbstractArchive var0, int var1, int var2)
 	{
 		throw new RuntimeException();
 	}
 
-	@Replace("loadSprite")
+	@Replace("SpriteBuffer_getSprite")
 	public static RSSprite rl$loadSprite(RSAbstractArchive var0, int var1, int var2)
 	{
 		Sprite sprite = spriteOverrides.get(var1);