Adjusted tthe logic of the server and client

when the client sends a wrong map the server will send the client back to the editro state

Projekte/battleship/client/src/main/java/pp/battleship/client/Menu.java

@@ -57,6 +57,8 @@ public Menu(BattleshipApp app) {
 
         addChild(musicToggle);
 
+        addChild(new Label(lookup("menu.volume")));
+
         Slider volumeSlider = new Slider();
         volumeSlider.setModel(new DefaultRangedValueModel(0.0 , 2.0, app.getBackgroundMusic().getVolume()));
         volumeSlider.setDelta(0.1);