v0.8.0: tweaked look and feel of desktop error message

desktop/src/main/java/com/shatteredpixel/shatteredpixeldungeon/desktop/DesktopLauncher.java

@@ -37,6 +37,7 @@ import java.io.PrintWriter;
 import java.io.StringWriter;
 
 import javax.swing.JOptionPane;
+import javax.swing.UIManager;
 
 public class DesktopLauncher {
 	public static void main (String[] arg) {
@@ -48,6 +49,12 @@ public class DesktopLauncher {
 			title = DesktopLauncher.class.getPackage().getSpecificationTitle();
 		}
 		
+		try {
+			UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName() );
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+		
 		Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
 			@Override
 			public void uncaughtException(Thread thread, Throwable throwable) {