New tutorial section on tunnels, fixed tutorial bugs

core/src/io/anuke/mindustry/ui/MenuButton.java

@@ -1,7 +1,6 @@
 package io.anuke.mindustry.ui;
 
 import com.badlogic.gdx.graphics.g2d.BitmapFont;
-import io.anuke.ucore.UCore;
 import io.anuke.ucore.core.Core;
 import io.anuke.ucore.function.Listenable;
 import io.anuke.ucore.scene.ui.Button;
@@ -9,22 +8,37 @@ import io.anuke.ucore.scene.ui.layout.Unit;
 import io.anuke.ucore.util.Bundles;
 
 public class MenuButton extends Button{
+	private static boolean hasInvalid = false;
+	private String text;
+	private boolean added = false;
 	
 	public MenuButton(String text, PressGroup group, Listenable clicked){
 		super("menu");
-		String style = "title";
-		float scale = 4f;
+		this.text = text;
 		BitmapFont font = Core.skin.getFont("title");
 		for(char c : Bundles.get(text.substring(1)).toCharArray()){
 			if(!font.getData().hasGlyph(c)){
-				UCore.log("No glyph found: " + c);
-				style = "default";
-				scale = Unit.dp.scl(1f);
+				hasInvalid = true;
 				break;
 			}
 		}
-		add(text, style, scale);
 		clicked(clicked);
 		group.add(this);
 	}
+
+	@Override
+	public void layout() {
+		super.layout();
+		if(added)
+			return;
+		added = true;
+		String style = "title";
+		float scale = 4f;
+		BitmapFont font = Core.skin.getFont("title");
+		if(hasInvalid){
+			style = "default";
+			scale = Unit.dp.scl(1f);
+		}
+		add(text, style, scale);
+	}
 }

core/src/io/anuke/mindustry/ui/dialogs/LanguageDialog.java

@@ -0,0 +1,12 @@
+package io.anuke.mindustry.ui.dialogs;
+
+import java.util.Locale;
+
+public class LanguageDialog extends FloatingDialog{
+    private Locale[] locales = {Locale.ENGLISH, Locale.FRENCH, new Locale("es", "LA"), new Locale("pt", "BR")};
+
+    public LanguageDialog(){
+        super("$text.language");
+        addCloseButton();
+    }
+}

core/src/io/anuke/mindustry/ui/dialogs/SettingsMenuDialog.java

@@ -106,7 +106,6 @@ public class SettingsMenuDialog extends SettingsDialog{
 	void addSettings(){
 		sound.volumePrefs();
 
-		//game.sliderPref("difficulty", 1, 0, Difficulty.values().length-1, i -> Difficulty.values()[i].toString());
 		game.screenshakePref();
 		game.checkPref("smoothcam", true);
 		game.checkPref("effects", true);