fixed updateIssue when param q is null

Author: magsout

webcompat/static/js/lib/issue-list.js

@@ -487,13 +487,22 @@ issueList.IssueView = Backbone.View.extend(
           this.issues.setURLState("/api/issues/search", paramsCopy);
         }
       } else if (_.contains(issuesAPICategories, category)) {
-        this.issues.setURLState("/api/issues/category/" + category, params);
+        this.issues.setURLState(
+          "/api/issues/category/" + category,
+          this.removeParamQuery(params)
+        );
       } else {
-        this.issues.setURLState("/api/issues", params);
+        this.issues.setURLState("/api/issues", this.removeParamQuery(params));
       }
 
       this.fetchAndRenderIssues();
     },
+    removeParamQuery: function(params) {
+      if (params && params.q) {
+        delete params.q;
+      }
+      return params;
+    },
     addParamsToModel: function(paramsArray) {
       // this method just puts the params in the model's params property.
       // paramsArray is an array of param 'key=value' string pairs