Notifications
{% include "controlpanel/notifications-list.html" %}Add notification
You can use Markdown in notifications. You can use '!everyone' as a recipient to show the notification to everyone, or '!admins' to show the notification to other admins.
For expiration time, enter amount of seconds. When empty, the notification will not expire. Note that if a notification is sent to everyone and made dismissable, any user can dismiss it and that will delete the notification for all users (so you probably shouldn't do that).