Fix fetch on scroll in email eventlog

dashboard/src/views/EmailEventlogView.vue

@@ -51,7 +51,7 @@ async function onScroll(event) {
     const [error, result] = await mailModel.eventlog(types.join(','), search.value, page.value, perPage.value);
     if (error) return console.error(error);
 
-    eventlogs.value = result;
+    eventlogs.value = eventlogs.value.concat(result);
   }
 }