Fix upload location.
Change TextObject.nowHasText to use Selenium's ExpectedCondition.
Remove unused FileBoxObject.id field.
Add a HiddenObject for getting at off-screen debug text.
Merge branch 'master' into stable

* master:
  Add a HiddenObject for getting at off-screen debug text.
  Remove unused FileBoxObject.id field.
  Change TextObject.nowHasText to use Selenium's ExpectedCondition.
  Fix upload location.