Added an INPUT HTMLElementType enum (for SHOW button)
Added an INPUT SUBMIT HTMLElement enum (for SHOW button)
ControlUI now checks for the existence of the SHOW button prior to processing page.
ClickShow method now uses select By.cssSelector when the XPath fails. NOTE: XPath selector will probably be removed.
Added waiting check to TestPersistence - but there is some refactoring work required here to avoid repetition.