private async void SendBtn_Click(object sender, RoutedEventArgs e)
        {
            var result = await SendFeedbackAsync();

            if (result)
            {
                FBFormControl.ShowPanel.Begin();
            }
            else
            {
                HideFeedbackForm.Begin();
            }
            FBFormControl.Imagefile = null;
            FBFormControl.SetSupportImageSource(null);
            FBFormControl.FeedbackTextBox.Text = "";
        }
 private void BackBtn_Click(object sender, RoutedEventArgs e)
 {
     HideFeedbackForm.Begin();
     FBFormControl.FeedbackTextBox.Text = "";
 }