Added global F7 and F10 shortcuts.

- F7: cycles through FPS settings.
- F10: toggles mouse enable/disable state during gameplay.

Also added bar notifications for saving/loading checkpoints.

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

src/itdelatrisu/opsu/states/MainMenu.java

@@ -486,6 +486,12 @@ public class MainMenu extends BasicGameState {
 		case Input.KEY_DOWN:
 			UI.changeVolume(-1);
 			break;
+		case Input.KEY_F7:
+			Options.setNextFPS(container);
+			break;
+		case Input.KEY_F10:
+			Options.toggleMouseDisabled();
+			break;
 		case Input.KEY_F12:
 			Utils.takeScreenShot();
 			break;