table-of-contents: avoid two-way binding on Input

Let's avoid using the `Input` component, as this provides a two-way binding on
the @checked argument. Let's use the regular `input` tag here with an
`onchange` helper to handle the toggling event.

Author: geneukum

app/components/table-of-contents.hbs

@@ -39,6 +39,6 @@
   </li>
 </ol>
 <label class='toc-private-toggle'>
-  <Input @type='checkbox' @checked={{@showPrivateClasses}} class='private-deprecated-toggle' />
+  <input type='checkbox' checked={{@showPrivateClasses}} onchange={{@togglePrivateClasses}} class='private-deprecated-toggle' />
   Show Private / Deprecated
 </label>

app/controllers/project-version.js

@@ -1,5 +1,5 @@
 /* eslint-disable ember/no-computed-properties-in-native-classes */
-import { computed } from '@ember/object';
+import { action, computed, set } from '@ember/object';
 import { inject as service } from '@ember/service';
 import { readOnly, alias } from '@ember/object/computed';
 import Controller from '@ember/controller';
@@ -121,4 +121,9 @@ export default class ProjectVersionController extends Controller {
 
   @readOnly('model.project.id')
   activeProject;
+
+  @action
+  togglePrivateClasses() {
+    set(this, 'showPrivateClasses', !this.showPrivateClasses);
+  }
 }

app/templates/project-version.hbs

@@ -34,6 +34,7 @@
     @moduleIDs={{this.shownModuleIDs}}
     @namespaceIDs={{this.shownNamespaceIDs}}
     @showPrivateClasses={{this.showPrivateClasses}}
+    @togglePrivateClasses={{this.togglePrivateClasses}}
     @isShowingNamespaces={{version-lt this.selectedProjectVersion.compactVersion "2.16"}}
   />
 </aside>