Added new menus, implemented using a generic ButtonMenu state.

New menus: beatmap options (erase scores/delete), delete beatmaps (single/all), reload songs.
- Pressing F3 or right-clicking in the song menu state will open the beatmap options menu.
- Pressing F5 in the song menu now opens a confirmation menu before reloading beatmaps.
- Deleted MainMenuExit state, which is replaced by MenuState.EXIT in ButtonMenu.
- Decreased Utils.FONT_XLARGE size (to fit in buttons).

Note: as of 800014e, song directory deletion is broken.

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

src/itdelatrisu/opsu/states/MainMenu.java

@@ -31,6 +31,7 @@ import itdelatrisu.opsu.Utils;
 import itdelatrisu.opsu.audio.MusicController;
 import itdelatrisu.opsu.audio.SoundController;
 import itdelatrisu.opsu.audio.SoundEffect;
+import itdelatrisu.opsu.states.ButtonMenu.MenuState;
 
 import java.awt.Desktop;
 import java.io.IOException;
@@ -417,7 +418,8 @@ public class MainMenu extends BasicGameState {
 		switch (key) {
 		case Input.KEY_ESCAPE:
 		case Input.KEY_Q:
-			game.enterState(Opsu.STATE_MAINMENUEXIT);
+			((ButtonMenu) game.getState(Opsu.STATE_BUTTONMENU)).setMenuState(MenuState.EXIT);
+			game.enterState(Opsu.STATE_BUTTONMENU);
 			break;
 		case Input.KEY_P:
 			if (!logoClicked) {