Returns whether the specified element selector is visible on the page.
    @Params
    driver - the webdriver object (required)
    selector - the locator that is used (required)
    by - the method to search for the locator (Default: By.CSS_SELECTOR)
    @Returns
    Boolean (is element visible)

def is_element_visible(driver, selector, by=By.CSS_SELECTOR):
    """
    Returns whether the specified element selector is visible on the page.
    @Params
    driver - the webdriver object (required)
    selector - the locator that is used (required)
    by - the method to search for the locator (Default: By.CSS_SELECTOR)
    @Returns
    Boolean (is element visible)
    """
    try:
        element = driver.find_element(by=by, value=selector)
        return element.is_displayed()
    except Exception:
        return False