fix: undefined on strings

src/components/sw-toolbox.js

@@ -10,6 +10,7 @@ if ('serviceWorker' in navigator) {
     let registration;
 
     const showSkipWaitingPrompt = (event) => {
+      if(hubl.intl.t('serviceWorker.newUpdate') != undefined) {
         Swal.fire({
           position: 'bottom-end',
           backdrop: false,
@@ -35,6 +36,7 @@ if ('serviceWorker' in navigator) {
             }
           }
         });
+      }
     };
 
     wb.addEventListener('waiting', showSkipWaitingPrompt);