Fixed bug where setButtonBlack set button white

frontend/core/src/com/gameware/game/sprites/PauseButton.java

@@ -74,6 +74,6 @@ public class PauseButton extends Sprite {
     }
 
     public void setButtonBlack(){
-        this.currentActiveTexture = this.whiteButtonTexture;
+        this.currentActiveTexture = this.blackButtonTexture;
     }
 }