Fix profile page (#115)

* add useful comment for developers
* allow to change only name, login and password in profile page

demos/_includes/App.php

@@ -41,6 +41,10 @@ public function init(): void
 
         $this->initAuth(false);
 
+        // Uncomment this line to enable ACL in demo app.
+        // We do not enable it in demo app by default to allow not logged in users to generate demo DB first.
+        // $this->initAcl();
+
         if ($this->auth->isLoggedIn()) {
             $this->auth->addUserMenu();
         }

src/Auth.php

@@ -287,7 +287,7 @@ public function setPreferencePage(VirtualPage $page): void
     {
         $f = Form::addTo($page);
         $f->addHeader(['User Preferences', 'subHeader' => $this->user->getTitle(), 'icon' => 'user']);
-        $f->setModel($this->user);
+        $f->setModel($this->user, ['name', 'email', 'password']);
         $f->onSubmit(static function (Form $f) {
             $f->entity->save();