[feature request] hide row on data table when the value is null.

[TomonoriSoejima]

Kibana version:
5.5.1
Elasticsearch version:
5.5.1

Describe the feature:
As you can see, when null comes back as part of the result, kibana UI on data table converts null to -.
The customer wants to hide the row itself entirely so as not to confuse operators using Kibana.
I don't think we cannot do anything about that on the server side and to do that it has to be done on UI.

It would be nice if we can make it configurable so you can hide the entire row or not.

[ghudgins]

Closing as a duplicate of #86190