title: Save file dialog doesn't appear sometimes
body: <p>I am developing an export function with save file dialog for list view, when list view rows go so much, more than 7000 or much, the save file dialog not appearing don't know why !  </p>
  
  <p>Update: added the snippet code, how I am filling the listview !</p>
  
  <p>Here is the code I am using for exporting listview,</p>
  
  <pre><code>private void ExportBTN_Click(object sender, EventArgs e)
  {
      DialogResult dialogeResult = sfd.ShowDialog();
      if (dialogeResult == DialogResult.OK)
      {
          using ( var tw = new StreamWriter(sfd.FileName))
          {
              foreach (ListViewItem item in URLListView.Items)
              {
                  tw.WriteLine(item.Text);
              }
  
              tw.Close();
              XtraMessageBox.Show("All links has been exported successfully.");
              AddLog("All links has been exported successfully.");
  
          }
      }
  }
  </code></pre>
  
  <p>Here is the way I am filling the listview: </p>
  
  <pre><code>    if(URLListView.Items.Count == 0)
      {
          XtraMessageBox.Show("You have to get the main links first");
          return;
      }
      if (GetInnerLinkBTN.Text == "Stop")
      {
          enablecontrols(true);
          StopGettingInnerLink = true;
          GetInnerLinkBTN.Text = "Start Get Innter Links";
      }
      else if (GetInnerLinkBTN.Text == "Start Get Innter Links")
      {
          enablecontrols(false);
  
          StopGettingInnerLink = false;
          GetInnerLinkBTN.Text = "Stop";
      }
      foreach (ListViewItem link in URLListView.Items)
      {
          string href = link.Text.ToString();
          if (href.Trim() != string.Empty)
          {
          //XtraMessageBox.Show(href);
          if (StopGettingInnerLink == true)
          {
              AddLog("Getting links has been stopped successfully!");
              StopGettingInnerLink = true;
              break;
          }
      else if(StopGettingInnerLink == false)
      {
          AddLog("Getting links from " + href);
          // MainWebbrowser.Navigate(href);
          runbrowserinthread(href);
          await Task.Delay(5000);
          AddLog("Giving the tool some rest for 5 seconds ! ");
      }
  }
  AddLog("Scrapping inner links has been finished successfully!");
  enablecontrols(true);
  </code></pre>