CSRF Protection (#235)

* Fix alert class name

* feature: csrf protection

* Cosmetics

* Fix token generate

* Admin Panel: changelogs csrf protection

* news/id route

* Refactor admin newses + add csrf

* Use admin.links instead

* Admin panel: Pages csrf

* Menus: better csrf + add success message on reset colors

* Plugins csrf

* Move definitions

* add info function, same as note($message)

* Update mailer.php

* Fix new page/news links

* clear_cache & maintenance csrf

* Formatting

* Fix news type

* Fix changelog link

* Add new changelog link

* More info to confirm dialog

* This is always true

system/templates/templates.header.html.twig

@@ -1,6 +1,8 @@
 <meta charset="{{ charset }}">
 <meta http-equiv="content-language" content="{{ config.language }}" />
 <meta http-equiv="content-type" content="text/html; charset={{ charset }}" />
+<!-- CSRF Token -->
+<meta name="csrf-token" content="{{ csrfToken() }}">
 {% if not is_admin %}
 <base href="{{ constant('BASE_URL') }}" />
 <title>{{ title }}</title>