Minor graphical updates and code cleaning.

- Padded game score display, and always display 2 digits in front of the decimal (e.g. 00.00% instead of 0.00%).
- Keep map progress circle at a fixed location instead of basing it off the score length.
- Moved some track resets (pause + restart at preview) to trigger upon loading the song menu.  Fixes weird behaviors when leaving the game state.
- Cleaned up trailing whitespace and added missing overrides.

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

src/itdelatrisu/opsu/states/SongMenu.java

@@ -18,8 +18,6 @@
 
 package itdelatrisu.opsu.states;
 
-import java.util.Stack;
-
 import itdelatrisu.opsu.GameImage;
 import itdelatrisu.opsu.GameMod;
 import itdelatrisu.opsu.MenuButton;
@@ -35,6 +33,8 @@ import itdelatrisu.opsu.audio.MusicController;
 import itdelatrisu.opsu.audio.SoundController;
 import itdelatrisu.opsu.audio.SoundEffect;
 
+import java.util.Stack;
+
 import org.lwjgl.opengl.Display;
 import org.newdawn.slick.Animation;
 import org.newdawn.slick.Color;
@@ -182,6 +182,11 @@ public class SongMenu extends BasicGameState {
 	 */
 	private boolean resetGame = false;
 
+	/**
+	 * Whether or not to reset music track upon entering the state.
+	 */
+	private boolean resetTrack = false;
+
 	// game-related variables
 	private GameContainer container;
 	private StateBasedGame game;
@@ -435,7 +440,7 @@ public class SongMenu extends BasicGameState {
 
 	@Override
 	public void mousePressed(int button, int x, int y) {
-		// check mouse button 
+		// check mouse button
 		if (button != Input.MOUSE_LEFT_BUTTON)
 			return;
 
@@ -657,6 +662,13 @@ public class SongMenu extends BasicGameState {
 			GameImage.destroySkinImages();  // destroy skin images, if any
 			resetGame = false;
 		}
+
+		// reset music track
+		if (resetTrack) {
+			MusicController.pause();
+			MusicController.playAt(MusicController.getOsuFile().previewTime, true);
+			resetTrack = false;
+		}
 	}
 
 	@Override
@@ -679,7 +691,7 @@ public class SongMenu extends BasicGameState {
 		while (n != 0) {
 			if (startNode == null)
 				break;
-	
+
 			int height = container.getHeight();
 			if (n < 0 && startNode.prev != null) {
 				startNode = startNode.prev;
@@ -777,6 +789,11 @@ public class SongMenu extends BasicGameState {
 	 */
 	public void resetGameDataOnLoad() { resetGame = true; }
 
+	/**
+	 * Triggers a reset of the music track upon entering this state.
+	 */
+	public void resetTrackOnLoad() { resetTrack = true; }
+
 	/**
 	 * Starts the game.
 	 * @param osu the OsuFile to send to the game