fixed refreshing of tablet app

public/js/pages/WarehouseShippingNote/WarehouseShippingNote.js

@@ -502,14 +502,15 @@ Vue.component('warehouse-shipping-note', {
     }
 })
 
-window.addEventListener('DOMContentLoaded', () => {
-    if ('serviceWorker' in navigator) {
-        navigator.serviceWorker.register('/WarehouseShippingNote/sw', {scope: '/'})
-            .then(registration => {
-                console.log('Patching PWA Service Worker registered with scope:', registration.scope);
-            })
-            .catch(error => {
-                console.error('Patching PWA Service Worker registration failed:', error);
-            });
+let hiddenTime = null;
+const RELOAD_AFTER_SECONDS = 300;
+document.addEventListener('visibilitychange', () => {
+    if (document.visibilityState === 'hidden') {
+        hiddenTime = new Date();
+    } else if (document.visibilityState === 'visible' && hiddenTime) {
+        const secondsElapsed = (new Date() - hiddenTime) / 1000;
+        if (secondsElapsed > RELOAD_AFTER_SECONDS) {
+            window.location.reload();
+        }
     }
-})
+});