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.new_thread.html.twig

@@ -1,4 +1,5 @@
 <form action="?" method="post">
+	{{ csrf() }}
 	<input type="hidden" name="action" value="new_thread" />
 	<input type="hidden" name="section_id" value="{{ section_id }}" />
 	<input type="hidden" name="subtopic" value="forum" />
@@ -45,4 +46,4 @@
 	<div style="text-align:center">
 		<input type="submit" value="Post Thread" />
 	</div>
-</form>
+</form>