title: open a new tab in RSelenium
body: <p>How do you open a new tab in <code>RSelenium</code>? Specifically, how do you specify the control key to send "CTRL   + T" to the window?  I attempt:</p>
  
  <pre><code>require(RSelenium)
  RSelenium::startServer()
  dr = remoteDriver()
  dr$open()
  b = remDr$findElement(using = 'tag', value = "body")
  b$sendKeysToElement(list("CONTROL + T")) #this does not work
  </code></pre>