Feature Request: (Web Viewer : Filters) Allow for `Property = null` to be visibility toggled

When Filtering by Properties, any elements without a value for that Property renders (I always think pink)


All non-null property values are able to be toggled for visibility and isolation. It would be helpful to isolate all those elements without a value for a given property.

In particular, I’m considering this from a data QAA workflow perspective.


Nice, and just in time - as we’re redoing the filtering api for the viewer!


Cool. While we are at it, can filter colorization be set to not override transparency too :smiley: