Merge pull request #3869 from pyramidsbuilder/fix-loginpage-focus-for-ws

handle focus error on blazor web assembly when verifying email address

Oqtane.Client/Modules/Admin/Login/Index.razor

@@ -166,6 +166,7 @@
     {
         if (firstRender && PageState.User == null && _allowsitelogin)
         {
+            if(!string.IsNullOrEmpty(username.Id))
                 await username.FocusAsync();
         }