Web compilation fix, new logging, cleanup

core/src/io/anuke/mindustry/Mindustry.java

@@ -41,6 +41,7 @@ public class Mindustry extends ModuleCore {
 
 	@Override
 	public void dispose() {
+		GameState.set(State.menu);
 		platforms.onGameExit();
 		Net.dispose();
 		super.dispose();
@@ -73,7 +74,7 @@ public class Mindustry extends ModuleCore {
 				Locale locale = Locale.ENGLISH;
 				Core.bundle = I18NBundle.createBundle(handle, locale);
 			}catch (Exception e){
-				e.printStackTrace();
+				UCore.error(e);
 				platforms.showError("Failed to find bundle!\nMake sure you have bundle.properties in the same directory\nas the jar file.\n\nIf the problem persists, try running it through the command prompt:\n" +
 						"Hold left-shift, then right click and select 'open command prompt here'.\nThen, type in 'java -jar mindustry.jar' without quotes.");
 				Gdx.app.exit();