## Image text alternative

* Click on image - balloon toolbar with text alternative change button should appear.
* Click on button in toolbar:
  * balloon toolbar should hide,
  * image text alternative balloon panel should be visible
  * there should be `CKEditor logo` text selected inside textarea.
* Change the text and press `Save`. Check if text alternative is changed by opening balloon panel again.
* Change the text and press `Cancel`. Check if text alternative is NOT changed by opening balloon panel again.

