Bug fixes and tweaks.

- Check if other Desktop actions are supported (follow-up to #114).
- The cursor-middle image is no longer scaled (when clicking).
- Changed the options menu background image (created with Trianglify at http://qrohlf.com/trianglify/), and made it fit the entire page.
- Slightly increased minimum splash screen time.
- Switched more animations to use AnimatedValue.

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

src/itdelatrisu/opsu/states/OptionsMenu.java

@@ -200,12 +200,12 @@ public class OptionsMenu extends BasicGameState {
 	@Override
 	public void render(GameContainer container, StateBasedGame game, Graphics g)
 			throws SlickException {
-		g.setBackground(Utils.COLOR_BLACK_ALPHA);
-
 		int width = container.getWidth();
 		int height = container.getHeight();
 		int mouseX = input.getMouseX(), mouseY = input.getMouseY();
-		float lineY = OptionTab.DISPLAY.button.getY() + (GameImage.MENU_TAB.getImage().getHeight() / 2f);
+
+		// background
+		GameImage.OPTIONS_BG.getImage().draw();
 
 		// title
 		float marginX = width * 0.015f, marginY = height * 0.01f;
@@ -213,9 +213,6 @@ public class OptionsMenu extends BasicGameState {
 		Utils.FONT_DEFAULT.drawString(marginX, marginY + Utils.FONT_XLARGE.getLineHeight() * 0.92f,
 				"Change the way opsu! behaves", Color.white);
 
-		// background
-		GameImage.OPTIONS_BG.getImage().draw(0, lineY);
-
 		// game options
 		g.setLineWidth(1f);
 		GameOption hoverOption = (keyEntryLeft)  ? GameOption.KEY_LEFT :
@@ -243,6 +240,7 @@ public class OptionsMenu extends BasicGameState {
 				currentTab.getName(), true, false);
 		g.setColor(Color.white);
 		g.setLineWidth(2f);
+		float lineY = OptionTab.DISPLAY.button.getY() + (GameImage.MENU_TAB.getImage().getHeight() / 2f);
 		g.drawLine(0, lineY, width, lineY);
 		g.resetLineWidth();