Click (or other Webdriver actions) not available on returned elements

click() (and all other webdriver methods) are not available on a returned element. Otherwise Webdriver seems to be working properly. Am I doing something wrong?

Note I'm not using `APP.client.click('button')` because I want to click the SECOND button. (Also, I'm having all sorts of problems getting xPath or CSS selectors to directly access the second button to work.)

```
const btns = await APP.client.$$('button')
console.log(JSON.stringify(Object.getOwnPropertyNames(btns[0])))
["ELEMENT","element-6066-11e4-a52e-4f735466cecf","value","selector","index"]
btns[1].click()
TypeError: btns[1].click is not a function
```

Reproduce the reported APP.client.$$('button') example and inspect how returned elements are represented and exposed through the Webdriver client. Compare the returned element API with the expected Webdriver actions, then verify that selecting the second button has a supported, testable interaction path.

Written by the indexing model from the issue text.