src/main/java/ch/unibas/dmi/dbis/cs108/casono/client/ui/IntroVideoPlayer.java

@@ -52,6 +52,7 @@ public class IntroVideoPlayer extends Application {
 
         stage.initStyle(StageStyle.UNDECORATED);
         stage.setFullScreen(true);
+        stage.setFullScreenExitHint("");
         stage.setScene(scene);
         stage.show();
 

src/main/java/ch/unibas/dmi/dbis/cs108/casono/client/ui/gameui/CasinoGameUI.java

@@ -148,6 +148,7 @@ public class CasinoGameUI extends Application {
 
         stage.setScene(scene);
         stage.setFullScreen(true);
+        stage.setFullScreenExitHint("");
         stage.setOnHidden(e -> controller.stop());
         stage.show();
 

src/main/java/ch/unibas/dmi/dbis/cs108/casono/client/ui/lobbyui/Casinomainui.java

@@ -49,6 +49,7 @@ public class Casinomainui extends Application {
         stage.getIcons().add(icon);
         stage.setScene(scene);
         stage.setFullScreen(true);
+        stage.setFullScreenExitHint("");
         stage.show();
     }