Fixed popup content props usage

[oleksandr-danylchenko]

Issue

In https://github.com/recogito/text-annotator-js/commit/7fafa46a8c3522753c9cace1027c4f02369d9a32 the interface of the TextAnnotatorPopup content props got updated in correspondence to the image popup. However, the test files were not updated along and it led to the exceptions when you try running the text-annotator-react examples on main.

[oleksandr-danylchenko]

I also noticed that the popup is displayed below the highlights. I suppose that's a regression from the https://github.com/recogito/text-annotator-js/pull/138 that missed somehow 🤔

[rsimon]

Thanks!