Update goBackToMain to hide walkthrough mode

index.html

@@ -1793,6 +1793,7 @@
             mainMenu.style.display = 'block';
             taskSelection.style.display = 'none';
             developerMode.style.display = 'none';
+            document.getElementById('walkthroughMode').style.display = 'none';
             trainingInterface.style.display = 'none';
             currentCategory = null;
         }