Small GUI tweaks.

- FPS display is now much more subtle.
- A couple of main menu tweaks.

Other changes:
- Restore old alpha levels of Utils.COLOR_* constants when modifying them.
- Utils.loadFont() can load any font effect, not just a ColorEffect.

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

src/itdelatrisu/opsu/objects/Circle.java

@@ -99,11 +99,12 @@ public class Circle implements HitObject {
 			float approachScale = 1 + (timeDiff * 2f / game.getApproachTime());
 			Utils.drawCentered(GameImage.APPROACHCIRCLE.getImage().getScaledCopy(approachScale), x, y, color);
 			float alpha = (approachScale > 3.3f) ? 0f : 1f - (approachScale - 1f) / 2.7f;
+			float oldAlpha = color.a;
 			color.a = alpha;
 			Utils.COLOR_WHITE_FADE.a = alpha;
 			Utils.drawCentered(GameImage.HITCIRCLE_OVERLAY.getImage(), x, y, Utils.COLOR_WHITE_FADE);
 			Utils.drawCentered(GameImage.HITCIRCLE.getImage(), x, y, color);
-			color.a = 1f;
+			color.a = oldAlpha;
 			Utils.COLOR_WHITE_FADE.a = 1f;
 			score.drawSymbolNumber(hitObject.getComboNumber(), x, y,
 					GameImage.HITCIRCLE.getImage().getWidth() * 0.40f / score.getDefaultSymbolImage(0).getHeight());