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/forum.edit_post.html.twig

@@ -1,5 +1,6 @@
 <br/>
 <form action="{{ getLink('forum') }}" method="post">
+	{{ csrf() }}
 	<input type="hidden" name="action" value="edit_post" />
 	<input type="hidden" name="id" value="{{ post_id }}" />
 	<input type="hidden" name="save" value="save" />
@@ -49,4 +50,4 @@
 	<div style="text-align:center">
 		<input type="submit" value="Save Post" />
 	</div>
-</form>
+</form>