Follow-up to c6791c4.

- Added score management menu for deleting individual scores.
- Store generated title string lists in the beatmap menus to prevent performance issues.

Allow using the right mouse button (as well as left mouse button) in all states.

Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>

src/itdelatrisu/opsu/states/GameRanking.java

@@ -140,7 +140,7 @@ public class GameRanking extends BasicGameState {
 	@Override
 	public void mousePressed(int button, int x, int y) {
 		// check mouse button
-		if (button != Input.MOUSE_LEFT_BUTTON)
+		if (button == Input.MOUSE_MIDDLE_BUTTON)
 			return;
 
 		if (data.isGameplay()) {