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/audio/MusicController.java

@@ -305,10 +305,10 @@ public class MusicController {
 	/**
 	 * Stops and releases all sources, clears each of the specified Audio
 	 * buffers, destroys the OpenAL context, and resets SoundStore for future use.
-	 * 
+	 *
 	 * Calling SoundStore.get().init() will re-initialize the OpenAL context
 	 * after a call to destroyOpenAL (Note: AudioLoader.getXXX calls init for you).
-	 * 
+	 *
 	 * @author davedes (http://slick.ninjacave.com/forum/viewtopic.php?t=3920)
 	 */
 	private static void destroyOpenAL() {

src/itdelatrisu/opsu/audio/SoundController.java

@@ -124,7 +124,7 @@ public class SoundController {
 		currentFileName = null;
 		currentFileIndex = -1;
 	}
-	
+
 	/**
 	 * Sets the sample volume (modifies the global sample volume).
 	 * @param volume the sample volume [0, 1]