API: Split BuildClientView into two separate events

Much easier to work with. Extension stub hasn't been updated yet.

src/Forum/Actions/ClientAction.php

@@ -11,9 +11,11 @@
 namespace Flarum\Forum\Actions;
 
 use Flarum\Support\ClientAction as BaseClientAction;
+use Flarum\Support\ClientView;
 use Flarum\Api\Client;
 use Flarum\Core\Settings\SettingsRepository;
 use Flarum\Locale\LocaleManager;
+use Flarum\Events\BuildForumClientView;
 
 class ClientAction extends BaseClientAction
 {
@@ -39,6 +41,14 @@ class ClientAction extends BaseClientAction
         $this->layout = __DIR__.'/../../../views/forum.blade.php';
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    protected function fireEvent(ClientView $view, array &$keys)
+    {
+        event(new BuildForumClientView($this, $view, $keys));
+    }
+
     /**
      * @inheritdoc
      */