Add option for Sentiment selection

core/templates/ui/drilldown/drilldown.html

@@ -115,6 +115,10 @@
                 <input type="radio" value="above" name="sentiment-method">
                 Above
               </label>
+              <label class="radio">
+                <input type="radio" value="nonzero" name="sentiment-method">
+                Nonzero
+              </label>
             </div>
           </div>