am 7abeba63: am 0d53fcad: am d642f829: am 54dee349: docs: Fixed broken urls in the UI testing training main page and revised intro to the \'Testing UI for a Single App\' class.

* commit '7abeba63b59b81a4b5d8a3edd1c54cbb037945fc':
  docs: Fixed broken urls in the UI testing training main page and revised intro to the 'Testing UI for a Single App' class.