Prevent empty table from displaying on landing page

[doolin]

Problem: the landing page displays an empty results table when there is no query to display.

The problem is that the response object is "valid" in the sense that it's not empty?, but when it's not displaying the results of a query, contains the HTML from the redirect coming back from the API server.

The code here needs is part of it: https://github.com/funginstitute/patentview/blob/master/app/views/maps/partials/_table.html.haml#L10