use a swal() loader to show test-in-progress state to user

resources/themes/pterodactyl/admin/settings/mail.blade.php

@@ -137,7 +137,16 @@
         }
 
         function testSettings() {
-            return $.ajax({
+            swal({
+                type: 'info',
+                title: 'Test Mail Settings',
+                text: 'Click "Test" to begin the test.',
+                showCancelButton: true,
+                confirmButtonText: 'Test',
+                closeOnConfirm: false,
+                showLoaderOnConfirm: true
+            }, function () {
+                $.ajax({
                     method: 'GET',
                     url: Router.route('admin.settings.mail.test'),
                     headers: { 'X-CSRF-Token': $('input[name="_token"]').val() }
@@ -150,6 +159,7 @@
                         type: 'success'
                     });
                 });
+            });
         }
 
         function saveAndTestSettings() {