Issues with non-ASCII symbols in Datasets Viewer

Hi,

At the moment, Datasets Viewer sometimes displays non-ASCII symbols (including but not limited to Cyrillic letters) in a way that’s basically unreadable. For example, Гамбурге may be displayed as \u0413\u0430\u043c\u0431\u0443\u0440\u0433\u0435. This, of course, makes it quite difficult to explore a given dataset.

The problem occurs only under specific conditions: the list view should be unchecked and the dataset feature causing this should be a sequence of strings.

I made a small PR fixing that some time ago. Basically, the cause of this issue is that by default json.dumps that is used for table view escapes non-ASCII symbols. So you just need to override that behavior.

Thanks for reporting! We are working on an update to the dataset viewer, and we will make sure to handle this case as expected.