improve test push notifications;

renames; more alerts (merge)

components/PwaManager.tsx

@@ -242,7 +242,10 @@ function PwaManager({ subs }) {
             headers: {
                 'Content-Type': 'application/json'
             },
-            body: JSON.stringify({ subscription })
+            //sends test notification to the current subscription
+            // body: JSON.stringify({ subscription }) 
+            //sends test notification to all subscriptions of this user
+            body: JSON.stringify({ id: session.user.id, title: "Тестово уведомление", message: "Това е тестово уведомление" })
         });
     };