Add busy dialog

Hcs.WebApp/Components/Pages/Account/Manage.razor

@@ -58,6 +58,7 @@
         </RadzenTabsItem>
     </Tabs>
 </RadzenTabs>
+<BusyDialog @ref=@busyDialog />
 
 @code {
     sealed class PasswordInputModel
@@ -72,6 +73,7 @@
     bool hasError;
     string? errorMessage;
     bool hasSuccess;
+    BusyDialog busyDialog;
 
     [SupplyParameterFromForm]
     PasswordInputModel PasswordInput { get; set; } = new();
@@ -83,6 +85,8 @@
 
         try
         {
+            busyDialog.Show();
+
             await IdentityService.ChangePassword(PasswordInput.OldPassword, PasswordInput.NewPassword);
 
             hasSuccess = true;
@@ -92,5 +96,9 @@
             hasError = true;
             errorMessage = e.Message;
         }
+        finally
+        {
+            busyDialog.Hide();
+        }
     }
 }