private void editableImage_BytesChanged(object sender, EventArgs e)
{
    if (editableImage.Bytes != null)
        _ = MercatorPenguin.Dialogs.Stop(this, $"Cette image pèse {editableImage.Bytes.Length / 1024} Ko !");
    else
        _ = MercatorPenguin.Dialogs.Stop(this, "Pas d'image !");
}