Gets the element's type.
Possible values include:
$w.TextInput$w.TextBox$w.RichTextBox$w.RadioButtonGroup$w.CheckboxGroup$w.Dropdown$w.SelectionTags$w.Slider$w.DatePicker$w.UploadButton$w.RatingsInput$w.AddressInput$w.Switch$w.SignatureInput$w.Captcha