Facets Dive handing of long strings

[jameswex]

If Facets Dive deals with a feature that is a very long unique string, such as an encoded image string, it uses that feature automatically as the label, which becomes unreadable. It also prints the entire encoded string in the info card when an item is selected.

I think Dive should take care to not use huge strings as automatically determined label feature, and not display all of them by default in the info card.

[jameswex]

@jimbojw FYI