FIX: Reset results on query redirect (#236)

# Problem

When switching group reports it was possible to have the `results` from a previous run (of a query) pass over to the rendering of a different query.

# Fix

Set the controllers `results` to `null` when first rendering the query

https://user-images.githubusercontent.com/50783505/228050384-5231f004-1dc2-4867-8d57-9db7706bb65f.mov

assets/javascripts/discourse/routes/group-reports-index.js

@@ -1,6 +1,5 @@
 import { ajax } from "discourse/lib/ajax";
 import DiscourseRoute from "discourse/routes/discourse";
-import { action } from "@ember/object";
 
 export default class GroupReportsIndexRoute extends DiscourseRoute {
   model() {
@@ -27,10 +26,4 @@ export default class GroupReportsIndexRoute extends DiscourseRoute {
   setupController(controller, model) {
     controller.setProperties(model);
   }
-
-  @action
-  refreshModel() {
-    this.refresh();
-    return false;
-  }
 }

assets/javascripts/discourse/routes/group-reports-show.js

@@ -1,6 +1,5 @@
 import { ajax } from "discourse/lib/ajax";
 import DiscourseRoute from "discourse/routes/discourse";
-import { action } from "@ember/object";
 
 export default class GroupReportsShowRoute extends DiscourseRoute {
   model(params) {
@@ -20,6 +19,8 @@ export default class GroupReportsShowRoute extends DiscourseRoute {
           model: Object.assign({ params: queryParams }, query),
           group,
           queryGroup,
+          results: null,
+          showResults: false,
         };
       })
       .catch(() => {
@@ -30,14 +31,4 @@ export default class GroupReportsShowRoute extends DiscourseRoute {
   setupController(controller, model) {
     controller.setProperties(model);
   }
-
-  deactivate() {
-    this.controller.showResults = false;
-  }
-
-  @action
-  refreshModel() {
-    this.refresh();
-    return false;
-  }
 }