Pages addon

Event needed for Page addon
Move this event down, just before `return $content` so it will be useful to other extensions that may want to access the content when non-html encoded. You can set a local variable `$content_html_enabled = $this->content_html_enabled()` so you can pass `content_html_enabled` to the new event too, for use in your add-on.

You should also then pass $uid, $bitfield, $options, $censor_text to the event so they can be available too.